Nobody cares to understand that the soul is eternal. It is changing, transmigrating from one type of body to another body. And there are 8,400,000 species or types of body, and we have been entrapped in this cycle of birth, death, old age and disease. This is our real problem.
But in the university or any educational institution, there is no department of knowledge to find out what is that thing which is entrapped within this body. We get this information from Bhagavad-gītā: dehinaḥ asmin dehe. Deha means this body, and dehinaḥ, the possessor of the body. Just like your shirt and coat. You are the possessor of the shirt and coat. The shirt and coat is not you. You are different from the shirt and coat. Similarly, we have got our two kinds of body—the gross body and the subtle body. The gross body is made of material elements—earth, water, fire, air, sky—and the subtle body is made of mind, intelligence and ego.
So when we quit this gross body, the subtle body carries me to another gross body. This is the law of transmigration. It is not the question of belief. It is a fact that if we neglect to study this scientific knowledge, then we are missing the opportunity, because in this human form of life the developed knowledge can study what is there within this body which is so important, which, missing, this body becomes worthless.