So the soul is eternal and the body is changing. That is explained in this Bhagavad-gītā. Most of you are well known to this book, Bhagavad-gītā. It is widely read book all over the world. So the first instruction given in the Bhagavad-gītā is this:
- dehino 'smin yathā dehe
- kaumāraṁ yauvanaṁ jarā
- tathā dehāntara-prāptir
- dhīras tatra na muhyati
- (BG 2.13)
These two lines of Bhagavad-gītā, that how the soul is transmigrating from one body to another, if we simply study these two lines, then our life becomes different. But 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.
So this Kṛṣṇa consciousness movement is preaching the important portion of the body—about the soul. To understand what is the soul, to understand what is the need of the soul, why he is entrapped within this material body, how the soul can be liberated, and after liberation, what is the function of the soul—these things are our subject matter. And these things are very nicely explained as preliminary study in the Bhagavad-gītā, and for higher study, for graduate study, in the Śrīmad-Bhāgavatam.
So our only request is that you are all students—you do not neglect this subject matter, this science to understand what is the soul. It is a fact. No scientific professor at the present moment can explain what is that thing missing, when this thing is missing, this body is called dead. What is the distinction of this dead body and the living body? So according to Vedic instruction, according to Kṛṣṇa's instruction, the body is always dead. But so long the soul is there, it appears to be living. Just like within your coat and shirt, so long you are there, the hand of your coat appears to be moving. Actually, the shirt or coat has no body, but because the original body is moving we see the shirt and coat is also moving. Similarly, this body is moving because the soul within, it is moving. As soon as the soul is out of this body, this body will not move.
So this science is very important science. That is the basic principle of understanding. It is not the question of thinking that one may believe in the existence of soul or one may not believe. But fact is fact. "Two plus two equal to four"—that is science. If somebody does not believe, if somebody says, "Two plus two equal to five" or "three," that is not scientist. Similarly, we may not believe in the existence of soul, but that is a fact. But if we want to study the subject matter very seriously and scientifically, then it will be possible to understand.
But the simple method recommended in the Vedic literature, that if you chant this Hare Kṛṣṇa, mantra then gradually your intelligence or consciousness will be cleansed, and you will be able to understand that you are not this body, that you are spirit soul . . . ceto-darpaṇa-mārjanaṁ bhava-mahā-dāvāgni-nirvāpaṇam (CC Antya 20.12). And if you understand that you are spirit soul, you are Brahman, then, at that time, you will become free from this blazing fire of material existence.