Raja Vidya - The Bhagavad Gita

There are two things (1) belief (2) laws of nature.

Bhagavad Gita deals with the "laws of nature". It is not a belief system like other religions. Therefore the Gita is different from mundane religion because it does not profess dogmatic beliefs. Anyone can believe in anything and have a gathering and call it religion. We don't care for such man-made belief systems.

Now, one may ask how do you know the tenets of Bhagavad Gita (upon which Krishna consciousness is founded) are actually laws of nature? To answer this question, below are the fundamental laws of nature as enunciated in the Gita.

1. We are spiritual beings encased inside physical bodies made of flesh and blood.
2. We are all individuals with certain character and personalities. Our identity remains and does not become zero, black or dissolve into oblivion after death.
3. When the body stops working, the spirit soul transmigrates into another physical body at death.
4. Every activity in this world has a consequence.
5. The entire creation animate and inanimate is produced from a Supreme Living Being
6. The minute spiritual beings come from the Supreme spiritual being whom we call Krishna
7. Purpose of human life is to stop assuming physical bodies and return back to our original spiritual nature with Krishna

Testing above assumptions/hypothesis

1. Physical body is born, grows old and deteriorates. However, the sense of "self" is constant. So despite the changing body from birth to death, we still "feel" the "sense of I" is the same. Hence we can conclude that there is something more than the physical constituting the "self". The mind and intelligence cannot be accounted as "self" because even the mind and intelligence changes as the body changes. The sense of "I", however, never changes from birth to death and we call that spirit soul. This is a simple thought exercise. There is growing evidence in the fields of neuro-biology and psychiatry that consciousness is completely separate from the body and mind. 
2. Past life memory is a concrete testimony to bullets 1, 2 and 3 above. It clearly shows that the person is a spiritual conscious being who maintains his identity and reincarnates into another physical body. Ian Stevenson and Jim Tucker have collected much evidence on this subject for the past half century. Hence one cannot ignore this phenomenon as mere chance or an anomaly. It has to be reckoned as valid scientific phenomenon. 
3. The legal and justice system of this world is based on bullet 4 above. Why would the cosmic order also not be of the same nature? In fact any sort of order can be established anywhere based on the chain of action-reaction. Besides how else can one explain such contradicting occurrences of bad things happening to good people and vice versa. 
4. Life comes from life. Bullet 5 and 6 above enunciates this point. Our daily experience of ourselves, and nature is enough evidence to prove this. Children are not born from dead mothers. Plants do not grow from rocks but from other seeds potential of growth. In other words, one living being gives birth to another. There is abundant evidence to prove this and none to the contrary. So in that sense this gigantic creation within which we exist has to come from an equally if not greater gigantic living being who is all powerful. 
5. In order to test bullets 6 and 7 which states that Krishna is our father/mother and that we have to return to Him can be tested by merely following the standard of simple living/high thinking and chant the Hare Krishna Mahamantra everyday.

Krishna Consciousness is not dogma. There is so much evidence around us and within us to categorically verify the truths as enunciated in the Bhagavad Gita. Only a stubborn lazy and short sighted individual will deny these laws of nature. By studying the Gita and living it with determination and patience, there is no doubt that one can directly experience a higher spiritual platform of life and eventually come in contact with Krishna. 

Hare Krishna