Why SUN and MOON both are considered as planet in Hindu astrology ? while modern science consider SUN as Star and Moon as natural satellite

Astrological knowledge is given to the world by Hinduism. From ancient time astrology is used to predict future of a person, area, nation and earth to be protected from natural calamities. On the position of planet in horoscope prepared from Birth time, Birth date and Birth place, future of some one is predicted. In astrology, nine planets are there, those are Sun (Surya), Moon (Chandra),  Mercury (Buddha), Venus (Sukra), Mars (Mangal), Jupiter (Brihaspati), Saturn (Sani), Rahu and Ketu.

When according to science there are only eight planets and one planets is removed from class of planet. Name of those eight planets according to science are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. While Plutos is removed from class of planets. According to modern science, definition of a planet in solar system is the heavenly body which revolve around the Sun which is considered as center of Solar system and the satellites (Sub planets) are those heavenly bodies which are revolved around the planets. Such definition is not properly fitted to Plutos. Pluto and it's satellite are look same and same in size and rotate on each other's axis and same revolve around the Sun. It couldn't be determined that which one is the planet and which one is satellite. Hence for the same reason, Pluto is removed from class of planet.

But according to Hindu astrology, the heavenly bodies, which are radiating light or reflecting light toward earth some how  and put effect on living thing of earth are called planets. The heavenly bodies due to whom rays toward earth is reaching or stopping rays to reach earth are called as planet. There will be a question, that most of heavenly bodies radiat light. Can those radiating bodies called as planet. Yes, can be called as planet but the rays comes from these planets doesn't reach to the earth, if reach doesn't put any effect to the life of living things on earth. Rays from Planets like Uranus and Neptune take too long time to reach earth and might be possible that sufficient amount of rays doesn't reach to earth surface. Hence Uranus and Neptune both are not considered under the astrological calculation. In some part of India, Uranus  is also considered for calculation.

In ancient time, earth is not considered as a planet. Because, as in Physics we have studied that the place from where an observer observe any thing is called as reference frame. Similarly, earth is considered as reference frame. Hence, earth is not considered as planet in astrological calculation and Sun and Moon both are considered as planet, even moon doesn't have its own light but it is radiated by Sun. Similarly like moon, other  planet doesn't radiate by their own but illuminated by Sun ray's reflection.

In modern science, there is no any planet like Rahu and Ketu. But in Hindu astrology, these two planets are considered under the astrological calculation. In Hindu astrology, these two planets are said as shadow planets. There is no physical existence of these planet. But a question come to our mind that, if these planets are shadow planet then whose shadow are called as Rahu and Ketu.

When Solar eclipse occur in sky, it is called in Hindu Mythology that Rahu planet engulf the whole Sun. You must know, how the event of Solar eclipse causes. According to modern science, when Sun, Moon and Earth comes in a straight line. The moon completely covers the Sun in day time and the shadow of Moon fall on earth. Due to this, severally darkness occur in day time during Solar eclipse on earth. Therefore, the shadow of Moon is called as Rahu.

Then we come to the shadow planet Ketu. When the event of Lunar eclipse causes in Sky, then Sun, Earth and Moon comes in a straight line and the earth cover up Sun completely. Then, the shadow of Earth falls on Moon and Moon look like hiding under the shadow even in full moon night. Therefore, the shadow of Earth is called as Ketu. A question rises in mind that,  are these shadows occur regularly in solar system. I will say yes. Because, these shadows not only occur on event of Solar eclipse or Lunar eclipse. If there is Moon and Earth, there must be shadow of these two. Hence, the shadow of Moon and Earth are considered under astrological calculation and considered as Shadow planet, named as Rahu and Ketu.

Related to the birth of Rahu and Ketu, a tale found in Hindu mythology that, during the churning of ocean known as Samudra manthan. By churning of ocean, a pot come out from ocean which was filled by eternal liquid (Amrut). If some one consumes this eternal liquid (Amrut). He will be eternal forever. Then deities decided, not to share this eternal liquid with demon. Other wise demon will be eternal and the whole universe will go toward the destruction due to demons. 

For this, Lord Vishnu incarnated himself as a lady to attract demons. Such a incarnation of Lord Vishnu is known as Mohin. Mohin take the Amruta pot and start to provide to deities and by some illusion, she provide liquor to demons in place of Amrut. Such a betrayal is get to know by a demon and he incarnated himself as deity and sit among the group of deities. 

Mohini was unknown about this and offered amrit to that demon. When that demon consume to neck area. Mohini cut the head of that demon. Head part of that demon became Rahu and Body part become Ketu. It's a mythological tale.

According to astrology (Shadow of Moon) Rahu gives opposite quality as compare to Moon. Moon is the plannet of mind, which gives positive thought. When the shadow of Moon (Rahu) give the negative thought. Shadow of earth (Ketu) give even more negativity than the Rahu. Rahu had consumed the Amruta. That why Rahu is placed in the group of deities and remain as eternal but never leave the quality of demon. Quality of Earth's shadow is also completly opposite to the earth. Earth provides life to creatures but Ketu (Shadow of Earth) destroys life.

Jai Mahakaal.

In any Hindu worship, Why filled water pot is worshipped first (Kalash Sthapan and Pooja)

During any religious ritual of Hinduism, a filled water pot with inverted coconut is placed near and worshipped. Many will question what is this and why such a filled water pot is worshipped. In approx 99% of Hindu ritual, filled water pot is worshipped.
Now I will explain, why it is worshipped and what is the reason to worship. Filled water pot is a symbolic form of mother earth and on its various part diifferent type of God are called and worshipped. Base of filled water pot signifies the grass land of earth, hence rice crop, paddy crop or maize crops are placed with some soil on the area, then after clay pot or any metal pots like silver, copper, brass etc is placed. Then water is completely filled up to the opening of clay pot which indicate that interior parts of earth having lots of water and mother earth has capability to store water. 

Opening part of filled water (Kalash) signifies the water reservoirs like ponds, rivers and wells where living beings consumes water for sustaining their life. A smallest part of mango tree with leaves are kept on filled water pot. This signifies for existence of longest tree on earth which are green and develop in the direction of sunlight, which is well known in botany as phototropism.Then a green coconut or inverted peeled coconut is placed on filled water pot which is the symbolic form of mountain on earth.
In Hindu ritual, placing and worshiping of filled water pot is called as "KALASH STHAPAN".

During placing of Kalash area by keeping some crop of rice, paddy aur maize, first mantra is chanted as "Bhu rasi, Bhumi rasi........." to worship supportness of mother earth (Adhara Shakti). During filling if water, seven holy rivers are called into kalasha with God Varuna (God of water).
Kalash is worshipped to enhance the "Dhara Shakti" means supportive power. Without supportive power, nothing can be happen. Without strengthening the base of a building, you can't built upper part of building. Hence, to get success in worship or anything, support power is to be worshipped first. This way mother earth is symbolically worshipped.

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Concept of Rebirth in Shrimad Bhagwat Gita on the ground of Science

In Hinduism, 90% of Hindus believe that there is life after death, there is compulsory death after life. But many peoples will questioned that is there any proof on the basis of science. Concept of Rebirth of soul is well said by Lord Krishna in Holy book Shrimad Bhagwat geeta. When a person take birth, he must have to die. If a person die, then he has to birth. Such a cycle of life and death remain continuous. But many people reject to accept it and appeal that this not  true on basis of science.

      In science chapter of thermodynamic, we have studied a law that "Energy in the universe neither be created nor be destroyed but can be transformed from one form of energy to another form. In Bhagwat geeta same law is explained as "Soul never had birth any time in past nor will die any time in future, but every time soul hold a new body like changing of cloth". Every time body dies but soul remain as it is. Soul is eternal.

Here, I want say that when a living body do movement for any activity. It mean body has some energy and when body dies, no activity is performed by body. It meant body loss the energy. So directly we can say, soul in living body is a kind of energy. If the law of thermodynamic is true in basis of science. Then we also can  rebirth concept is also true.
In universe, everything has mass and on duration of time that mass body losses in the form of energy to the universe and returns back to existence in another mass form. According to Einstein's Law of relativity, everything that have mass, that thing must have energy.

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Jai Mahakaal

Why Lord Ganesh is worshipped first before starting any worship or initiating any good activity?

In Hinduism, before starting any Spritual rituals, functions or any activity. Lord Ganesh is worshipped first. Behind this, there is a great hidden science. Many peoples even don't know that Lord Ganesh is the Lord of Mind or can the controller of Psychic powers. Lord Ganesh always provides a positive thought and joyful mind. For performing any activity, hence Lord Ganesh is recalled before starting that activity. On recalling or worshiping, that work is get completed without any hurdle or problem. Because successful completion of any work us completely depends on positive attitude and joyful thought.
Itself name "Ganesh" indicate what it's mean. Meaning of Ganesh is the Chief of group. Can be said master in expert group. As we know mind is Chief controller of human body. Mind controls the body and hence, Organs of the body are Gana or Group and Mind (Maan) is the controller of Gana or Group. Therefore, Mind can be called as Ganesh.
In puranas, it is found that Lord Ganesh was born from Mother Parvati. Mother Parvati had given birth to Lord Ganesh by making idol, collecting her body dirt's and paste of turmeric that she was using to polish that on her body. Then, she give life to Ganesh by using Psychic power. If this story is used to understand properly and any one can get reality of it. Some people's questions me during my preaching, then how Lord Shiva become the father of Ganesh.
Lord Shiva is great yogi, no one can become master in yog without controlling his mind (Maan). Lord Shiva is the controller of Mind by doing continue meditation called Sambhavi mudra. Third eye of Lord Shiva, it self indicate that he has complete control over the mind and has developed well.
Mouse is the vehicle of Lord Ganesh it indicates that Mind is very fast and hurry. It couldn't be controlled by any ordinary people.

Jai Mahakaal.

Why marijuana and belladone generally used to worship Lord Shiva?

In Hindu worship of Lord Shiva, it is generally observed that Marijuana (Ganja or Bhang) and Belladone fruit (Dhatura) which are offered to Lord Shiv as food. These both substance are come under the narcotic act and using in India is illegal. Then some may ask that then why these things are used in worship and also being consumed by some devotees. Yes using of these narcotic materials cause to health problems if these things are taken in excess quantity more than required quantity. According to tantrik and yogic experts considers that consuming Marijuan (Ganja) as smoking or eating Marijuana (Bhang) and Belladone (Dhatura) help to attend deep meditation and Samadhi. As Lord Shiva is the Supreme Yogi and Tantrik, Lord Shiva alway happy to consume and smoke marijuana. With that he also love to eat Belladone.
Hence, typical Shiva Devotees like aghories and Kapaliks alway used to consume Marijuana and Belladone. A chemical compound containing in Marijuana is called Cannabinoid that affect our brain neutons  to think and concentrate on single thought. Due to Cannabinoid, dopamine is get secreted in brain. Then the person feels pleasure, relaxe and euphoria. Therefore, in ancient  india sages were using marijuana to go in deep meditation.

What is the actual meaning of Yoga

The word Yoga is most popular now a days in whole world. In Sanskrit, Yoga is called as Yog, which is the correct pronunciation. The name Yoga is given by Western practitioners when Yog reached to western countries. In western countries and other countries in the world  considers it as a only exercise to stay fitt. Even in India, modern Indians don't know what is the meaning of yog and they also consider it just an excercise to live a healthy life.
        Practicing Yog regularly, one can achieve the physical as well as Spirituality. Main objective of Yog is to achieve Spiritual upliftment. As we know that a healthy body have a healthy mind. Similarly, Yog started to make body healthy and automatically mind becomes healthy. A healthy mind brings Spritual development in that person.
       In ancient text, It is defined as addition of something is called Yog and Separation of Something are called Viyog. The Spritual meaning of Yog is that the soul of living creatures alway want to get add with supreme soul. Another meaning of Yog is to wake up inactive Kundalin and to get add into Shashrar Chakra to see Brahma Darshan.
         There is various kind of Yog in Hindu text and all describes well. But modern Indians are not aware of it. They only know that YOG means Pranayam (also known as breathing excercise), Asanas ( Various posture),  Dhyan ( Meditation). In Shri Madd Bhagwat Gita, there is 18 lessons and each and every lesson teaches a different kind of YOG. Title of Some of lessons are Sankhya Yog which is also known as Gyan Yog, Karm sanyash yog, Akshar Brahma yog, Bhakti yog etc. In other text also, various kind of Yog are mentioned like Naadanushandhan Yog, Mantra Yog and Tantra Yog.
Peoples only know about Ashtang Yog or Hath Yog. Ashtang Yog is not initiated by Patanjali but it is complied by Patanjali in later stage. In ashtang yog means eight parts of Yog is a works of compilation by Maharishi Patanjali. Eight part of Yog are Yam, Niyam, Asan, Pranayam, Pratyahara, Dharana, Dhyan and Samadhi. There is also sub part of Ashtang Yog.

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Why out cast marriages were not allowed in Hinduism?

As we know that there is Casteism in Hinduism. Group of Hindu peoples are divided into four cast (Varnas). You know those Varnas are Brahmin, Kshatriya, Shudra aur Vaisya. In Hinduism, one cast person could not do marriage with other cast person in ancient times. Those ancient peoples of India were well known about the Genetics and inter mixing of qualities. They knew that if two good qualities of characters (Genes) are mixed, then a better quality is gained. Which is good for development of society. If one bad quality and a good quality get mixed, then it may be dangerous for society. Because new born quality may be harmful for society.
In Mahabharata, during the starting of war, one reason Arjun was saying to Lord Krishna not to fight this war. The reason was that if Arjun defeat Kauravas by killing Kaurava warriors. Then thier widow wife may give birth to Varna sankoor child after having sex with other cast person. For example, a person with good intellectual and bad behaviour is not good for society. I can suggest a such kind of person from mythology. That was Ravan, he was the son of Rishi Durvasa and Demoness Nikasha. From them, Demon King Ravan was born. Ravan had having great intellectual but his behaviour and quality was like a demon.
        In mahabharat also, there is a story of intermixing of two different qualities. That story is of Ghatotkach. He was the son of Bhim and Hidimba. Bhima was a human being and Hidimba was a Demoness. But due to some reason, they both get married and Ghatotkach was born. Ghatotkach was half human being and half demon. He was having human behaviour and having strength and power like a demon.
      Therefore, the probability of birth of a varn sankoor child may or may not be harmful for society. But maximum probability of a varna sankoor is on side of destruction of society. Hence in Hinduism, it was not allowed.

Jai Mahakaal
          

What is Upvasa (Fasting) and what are the advantages of it?

In Hindu religion, Doing fasting is a very significant. Fasting is also occurs in other religions like Jain, Buddhism and even in Islam. Question is why fasting is performed and what are the significance of it. In Hindi and Sanskrit, fasting is called as "UPVAASA". Actual meaning of UPVASA means second type of living. First type of living is as we live life normally like eating, sleeping and doing social activity. In second type of living means living near to self and identifying self. Another way we can living near to almighty. If we say, bringing changes in daily routine is called UPVASA. UPVASA doesn't mean only fasting or avoiding food to eat. It means bringing changes in normal routine work.
          For example, as we work daily in offices or factory and take a leave on Sunday for relaxation and regain our energy. Similarly, Ancient sages and saints were so intelligent that they knew, human body needs relaxation after a continual work for better health. Hence, they advised society to do this and for spiritual development, they connect this to god. Therefore people started to please God and fulfillment of there wishes. Peoples gained spiritual upliftment and remain healthy. In Ayurveda, it is advised to do fasting once in a week for living healthy.
           The doctors and bio students must know that some part of glucose from digested food get stored in liver in forms of Glycogen for further utilization. When the human body will not get food in time, then for proper functioning of human body, Glycogen stored in liver again get converted to Glucose and utilized. Due to this human body become healthy. Such types of process can be seen in animals and other living thing in another form.
         Now a days, people don't understand significance of fasting. They eat more than required quantity. Due to this, peoples suffers lots of diseases like diabetes, obesity and over weight. Even daily they eat lots of fast foods, which are not healthy. If they feed on fast food, so they should do fasting once in a week. On eating fast food, digestive system of human body do hard work to digest fast food and it take much time to digest. Hence by doing fasting, digestive system get relaxation and regain it functional activity.
              Basically there is two types of fasting called as 1) Kastha and 2) Nistha .
In Kastha fasting, Strictly food is not eaten from first day sun rise to second day sun rise. In Nistha fasting, Food is not eaten during day time but fruits and cow milk is allowed to eat after sun set. Fruit is used to eat after sunset because fruit is easily digestible.
            As I said above that UPVASA meaning is not only to stop eating food for a day here. UPVASA means to controlled anything that you do daily. Another name of UPVASA (Fasting) mean VRATA, some people in Hinduism do Nirjala ekdasi, in which they don't drink water for that day. Not drinking water, for that day, digestion as well as activity of Urine system get relaxed and the functionality of this system increases. During performing of such UPVAASA or VRATA, there is the condition not perform any physical activity and not to go out from home to get exposed to strong sun rays. Another example is MOUN VRATA, in which the person not speaks out or talk with any person. We must know that by talking, we losses lots of energy. So in Hinduism, people performs MOUN VRATA, to control their energy losses. Mahatma Gandhi was also doing MOUN VRATA once in a week.

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Why is it mandatory to worship Lord Ganesh during initiation of any other worship in Hinduism?

In Hinduism, there are five prime god called as panch dev (Five god). The name of those five gods are Lord Vishnu, Lord Shiva, Lord Ganesh, Lord Surya (Sun) and the godess Durga. Among these five gods, Lord Ganesh have their own significance. Lord Ganesh is considered as first worship able before the worship of any other God or Godess. Hence Lord Ganesh is called as "Pratham Pujan". Meaning of Ganesh name is chief of the group or leader of the group. If we try to understand that the mind (Mann) controls the body.  Body is the group and mind is the leader of whole body. Hence it can be said that the Lord Ganesh is the god of mind or mental powers.
       In ashtang yog (eight part yog), yogi concentrate on different spiritual wheels, which are present in human body to increase the power and to achieve spiritual upliftment. There are seven spiritual wheels in human body. Those are Mool dhara chahta, Swadhisthan chakra, Manipur chakra , Anahad chakra , Vishudh chakra , Aagya chakra. Among these chakra, Aagya chakra is most significant chakra because it controls other chakra. As I said that Lord Ganesh is the god of mental power. Hence, for concentration and feeling during Pooja, Lord Ganesh is worshipped first. In any Pooja, without concentration and feeling, it is considered that there is no advantages or achievement by performing any worship.
           Ashtang yogis practice to concentrate on third eye (Aagya chakra). It is nothing but a kind of worship to Lord Ganesh. Lord Shiva and even Goddess Parvati having third eye means they have Lord Ganesh as their son. According to puranas, Lord Ganesh have not born as per Brahma created nature or sexually. Lord Ganesh has been born through psychic energy of Godess Parvati. Lord Shiva alway practices shambhavi mudra mean practicing concentration on third eye. Hence Lord Shiva has complete control over the third eye and called as Shambhoo.

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What is the meaning of Bali ritual (Sacrifice ritual) in Hinduism?

In various Hindu text like Vedas and Puranas, Bali ritual was there, Bali ritual means Animal sacrifices. During Aagya, animals were beheaded and given up in Yagya Kinda to satisfy Gods of heaven. Whatever are written in Vedas are kind of sign language. Bali (Sacrifice) doesn't mean to be headed the animal and give up in Yagya. Here are the some proof that , which indicate what is the exact meaning of Bali.
                 In Vishnu puran, it is heard that there was a Demon King name Maharaj Bali, who on the basis of his power, conquered the heaven of God Indra.
                 Maharaj Bali was great Beneficent or donor. It is said that no one was returned empty handed from his door step. Because of Beneficent nature and religiously active, he was called as Bali. Bali means who can give up his everything to any needy person.
             In vedic rituals, there is nothing to kill any animals. But feed animal during Yagya. In tantrik rituals only, animals were beheaded for eating thier meat. On hearing, various types of Bali ritual comes to hear like Pashoo Bali (Animal Sacrifiece), Matsya Bali (Fish Sacrifiece) and Manav Bali (Human Sacrifiece). If I say directly meaning of Bali (Sacrifiece), who give up his favorite things and Sacrifiece own desire is called Bali. Pashu Bali means feeding to animals, Matsya Bali mean feeding to Fishes, Manav Bali means feeding to Human.
        Another thing, in vammarg tantra, tantrik used to beheaded  animal infront of Goddess. It's a cruelty that is necessary to perform in Vammarg tantra. The tantra practitioner losses heavy amount of protein by practicing tantrik sadhanas. Hence they use to eat animal eat and for deep meditation, they drink alcohols. But in vedic rituals, cruel Sacrifiece of any living being is not allowed.

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Why saint and Sages of Hinduism eat dinner before the sunset ?

You must have known about Yogis, Saints and Sages. But very few peoples know that Saint and Sadhus complete their dinner before sunset. You must be thinking that why they do like this. Is there any scientific reason behind this?. Ya, there is many scientific proof to explain it. The reason behind this is darkness. In ancient time, there was no electric city, and not having sufficient source for lighting. Hence people used to complete their major part of work before sunset and sleep early. Not only dinner, there is other works also, which were not allowed to perform at night. In puranas and upanishads, major and critical works are refused to do at night like cooking, eating,  shaving, cutting nails, running, climbing on tree, collecting flower from tree and collecting wood.
    Cooking of food was also not allowed at night because during cooking, there was possibilty that night creatures or insects may fall in cooked food and it may cause unhealthy for human being. For same reason, eating food at night was not allowed due to improper visibility. Cutting nail was not allowed at night because during cutting of nail, one may harm himself by cutter.
     Collecting flower from tree is dangerous because of improper visibility and presence of poisonous snake or insect on branches of flowering plant may bite any one.  
          One more reason is there for completing dinner before sunset. As per Ayurveda principal. There should be two hour gap between dinner and bed time. Many peoples suffers from constipation, gas, acidity and indigestion because of peoples complete their dinner and soon they go to bed. Due to this, peoples also suffers from overweight and  obesity. But in modern age, everywhere electricity is available. So we can eat at night but should have maximum 2 hour gap between dinner and sleep. Also western peoples accept that after taking dinner one must walk for some distance better digestion. Thank You

Why Soap should not be used daily during bath

In modern India, I think 80% of population use Soap daily during taking bath. Using soap daily during bath, it harms the skin . If they don't use soap daily then they don't feel freshness, they say. In summer season, many peoples says that they feel very hot even under the fan and they go for Air conditioning system. Even they can't tolerate to direct sunlight. Practically, I have observed that the farmer or village people work under the direct sunlight for whole day. And in cities, people work in offices lost their ability to stand on sunlight even for 15 minutes. I found the difference between these two type peoples that village peoples don't use soap daily and city peoples use soap daily during bath.
         By using daily soap, sweat gland and  sebaceous gland pore become wide. Similarly, as the stomata of leaf become wide and losses water very fast. Due to this, the rate of perspiration increases and water level in body decreases and a man feel thirsty very soon and feels very hot. On Losing water by increasing rate of perspiration, body can't maintain normal temperature. Hence they can't tolerate more temperature.
        Due to widening of sebaceous gland, which secret oil and keep skin moist naturally. They remove this secreted oil by using soap daily. Hence the city peoples look more fair than the village peoples. For protecting from sunlight, city peoples use sunscreen lotion to protect their skin from sun rays.
        But in villages and Hindu religion, there was tradition to self massage of body by some oil like coconut oil or mustard oil, this is called Tailanga . By massaging oil daily on human body, a  person feels relaxation and physically active. Even today, my father used to massage his body with oil himself. He had learnt it from our forefather and he can work under the sunlight in summer for long hour.
        Another research says that the uses of soap, perfume and deodorant prevent the effectiveness of pherohormans. Pherohormans is a biological chemical which is screated from male insects to attract female intracts. This is a kind of biological signal to female insect for mating. Similarly, on the basis of scientific research, it is found true and the secretion of Pherohorman is found in maximum creatures, even in Human body. Daily using of soap, prevents the Pherohorman secretion and decreases it's effect.

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Why Holi festival is celebrated in Hinduism and what is the scientific reason?

Holi is a big festival of India, and it is celebrated every year in month of Falgoon 
(February to March) of Hindu month. It is known to every one that Holi is celebrated after the death of Holikaa. Holikaa was the sister of Hiranakshya the evil king. Who was blessed from brahma that she can't be burn in fire. When she tried to kill Prahlaad the great devotee of Lord Vishnu and the son of her brother Hiranakshya. She was burnt herself because of evil thought about Devotee Prahlaad and to kill her. After the death of Holikaa, Holi is celebrated by merging colour to each other. All these are external meaning of Holi festivals. It can be said that behind the festival of Holi. There is various scientific and spiritual reasons. Very few peoples know that Holi is not just celebrated only with chemical colours. It is enjoyed by merging colour and mud to each other.
       Here is the scientific reason for celebrating Holi. As we know that Holi is celebrated in March, Which is the first month of summer season. In Hindi, Holi is also depicted as Fagu festival means the Festival of Hindu month Falgoon. In this month, lots of flower are observed on tree  and these flowers are collected to prepare natural colour. In these natural colours, lots of healing medicines are found which make skin to glow and prevent skin diseases. Before merging colour, peoples used to play with mud. These muds make skin smooth, which was dried up during winter season and open ups the pores of sweat gland and sebaceous gland. Then peoples use to play with fagoo (Colour prepared by natural flower). These medicinal colour penetrates internal part of skin and prevents harmful particals. This medicinal treatment also protect from Sunstroke during summer season and regulate the rate of perspiration etc.
       Youngness and beauty will not persist for long time in human life. And the peoples who have ego on their beauty and smartness, they must know that time and age cannot be stopped. The time will pass on day by day. Celebration of holi gives message to peoples to see there face in Holi. With coloured face, one can realizes that her beauty will not be forever and his human body will also not be forever, death of human body is true. Therefore  they experience divinity and achieves spiritual upliftment. They get to know the reality of life. Holi make every one Happy and says to laugh and enjoy the life of every moment and serve God under his feet. In reality, that almighty is only having beauty. Many time it is called in Sanskrit that Satyam Shivam sundaram means truth is God and God is beautiful (God is only truth and God is only beautiful) Nothing is beautiful than that almighty.
            There is a example found in Shrimad Bhagwat Puran, in which it is mentioned that Gopis (Ladies of Gopal community in Vrundavan) had ego for being beautiful and they were thinking that nothing is beautiful than them. Lord Krishna is incarnated and destroy the egoness of Gopis. All Gopis were strongly attracted toward Lord Krishna because of his beautiful and gorgeous incarnation. Lord Krishna played Holi with Gopis and destroy their ego and divert then to devotion.

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Why castism is there in Hinduism

In Hinduism cast system can be observed , which is well known as Varna Bevastha (Cast System) in Sanskrit. In ancient time, such a system was created for suitability of society and to help each other. Varna Bevastha is nothing but the allocation of some dedicated work to a selected group of people as per their expertise. Basically 4 varna mean communities are seen. Those are Brahmin, Kshatriya, Shudra and Vaisya. All four varnas are most important parts of society like the four pillar of any house.   Responsibility of Society cant be put on a single community (Varna) people. As we to build house on a single pillar. Among these four varnas Brahimins are most respectful varna (Community) than all other varna or community. One question will be raised in mind that "what is the meaning of Brahmin". Brahmin is sanskrit word which mean the person who follow Brahma (Soul). Another way this varna people are called Brahmin due to Lord Brahma who has created this whole universe. It is consider that the Brahmins are born from the head of lord Brahma. In society, Brahmins were most respectful because of there knowledge. They were teachers in society, they were advising peoples about everything like what is good and what bad.
    The second highest varna (Cast) is kshatriya. It is like Kshatra (Region) and triya (Protector), Kshatriya means the cast who protects there mother land from external enemies. Kshatriya are warrior and they practice the techniques to fight with opponents. Kshatriya protect other varna people. Mostly Kshatriya were king. It is considered that Kshatriya are born from the Chest of Lord Brahma. It was called as second pillar of ancient Arya society. They were allowed to perform cruel activities like hunting.
         The third varna is Vaisya, these peoples were less educated and for their living hood. They were doing farming, rearing animals and doing business. Vaisya mean the peoples who perform low quality works. They also were working as servant for king and rich peoples. Vaisya means who sold their service for money. Another meaning of Vaisya is whose grade is low and having uncontrolled desires. This varna is considered that born from the thigh part of Lord Brahma. It can be called as third pillar of ancient Hindu society.
             The fourth varna is shudra, and it is last varna and fourth pillar of ancient Hindu society. Shudra or Kshudra means small whose living standards are very poor and not accepted in the society. Such kind of peoples are called Shudra. Whose mentallity and living standard quality is small or lower than the social standard. Shudra varna peoples are uneducated, speak bad language and behave unlawful. They live life with meat, alcohol and sex as they desire. They didn't have control on their desires. They were not involve in spiritual activity. They were doing business of skin.
          Varna arrangement were depending on the quality of people in society. It was not being transfered from father to son and from son to grand son. Suppose a person is brahmin having good knowledge about vedas, puranas, spiritual, Ayurveda, astrology and science.   The son of that person having the quality of shudra and live life with alcohol and meat can't be said as brahmin. Similarly a person is shudra and his son has good practice over the vedas, shastra, upanishads and vyakaran. Then his son is deserve to be called as brahmin.
           In Hindu puranas, there are many examples, where peoples have changed their Varnas. Like Brahmrishi Vishwamitra,  before becoming a Brahmrishi, Vishwamitra was a King means Kshatriya. After gaining knowledge, he became Brahmin and depicted as Brahmrishi. Another example is found in Ramayan, in which Maharishi Valmiki was also an shudra, whose work was to do stealing and dacoiting. After getting knowledge by hard penance, he became Rishi Valmiki and composed Ramayana. In olden days Casteism doesn't passes from generation to generation for a family. But it was the division according to thier quality of work and professionalism. We should understand that as a doctor cann't work in place of a engineer and an engineer can't work in place of advocate and an advocate cann't work in place of Barbara. As in modern days, we have divided the professionalism as per thier achieve knowledge. Similarly, these four Varnas were divided as per their achieve knowledge and behaviour. As it is not necessary that the son of a doctor should accept the profession of doctor and he might become a engineer. Similarly, in ancient time, it was not necessary that the son of Brahmin will be a brahmin. As time passes, Brahmin father transfer his knowledge to his son and a Kshatriya transfer his knowledge to his son. This process was continue further and it become limited to particular family and relative. In later stage, it was misunderstood. Thank you