So I have talked with so many big professors in Russia, and their theory is that "After finishing this body, everything is finished." But (if) everything is finished, then why you are working so hard, if everything will be finished? They... Their, their theory is different. That is asuric theory, asuric theory. They do not believe in the self, they do not believe in God, they do not believe in the next birth, although these are facts. Simply a sober brain with cool head, one can understand. But these are facts. They're taking risk only. Now, by ordinary common sense knowledge, if I say, "There is no next birth," that is not authoritative. Because authoritative knowledge is... Suppose from Bhagavad-gītā, next life is accepted. Tathā dehāntara-prāptir dhīras tatra na muhyati (BG 2.13). The beginning of Bhagavad-gītā is to teach that soul is eternal, it is migrating from one body to another, so there is next life. That is also authoritative knowledge. But if somebody says that "There is no birth," that is not authoritative. That is a layman's statement.
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You have to accept this, dehāntara-prāpti, from one body to another. Where is my childhood body? That is gone. Where is my boyhood body? That is gone. Where is my youthhood body? That is gone. Not only for me, for everyone. There is past, present and future. Similarly, when this body will be gone, I will get another body. Where is the difficulty to understand? Tathā dehāntara-prāptir dhīras tatra na muhyati (BG 2.13). Dhīra. Because we are not sober... There are two classes of men: dhīra and adhīra. Dhīra means sober, thinking, thoughtful, and adhīra means restless. So with restless brain, it is difficult, but if you have got sober brain, then there is no difficulty to understand that "I am eternal. I was in the child's body, I was in the baby's body, I was in the boy's body, I was in a young man's body. Now I have got a different body. I am living asmin dehe." Dehino 'smin yathā dehe (BG 2.13). It is very easy to understand, but Kṛṣṇa says, dhīras tatra na muhyati: "Those who are sober, they can understand."
Therefore Kṛṣṇa consciousness movement is very important movement. We appeal to the sober class, dhīra, not the adhīra. We also accepting dhīra and adhīra by the mercy of Śrī Caitanya Mahāprabhu, by the mercy of the Gosvāmīs. Dhīradhīra. Dhīra and adhīra. Just like these boys and girls, they were adhīra. Now they are dhīra. Adhīra. Adhīra means without any responsibility, doing all nonsense. Actually they are rich nation's sons and daughters. They are doing ev..., but now they have become dhīra. "No illicit sex, no meat-eating, no intoxication, no gambling. Yes, sir." This is dhīra. You are already intoxicated. You are already illusioned in this material world. If you still go on drinking, where is the possibility of knowledge? You must have sober brain to understand. So this is going on. Therefore my appeal to all the sober men: to understand this Kṛṣṇa consciousness movement and join it for the benefit of his personal self, for the benefit of his country, for the benefit of the whole human society.
Conversations and Morning Walks
1973 Conversations and Morning Walks
Prabhupāda: That intelligence gives me, Kṛṣṇa, "You do this." Buddhi-yogaṁ dadāmi tam. Yes. And in my materialistic life, He was taking away my intelligence. Just like this Bose, Bengal Chemical agency, I should have accepted immediately. Such a big concern. Simply by sitting, I would have brought ten thousand rupees per month in those days. But there was no good intelligence. I thought, "No, I cannot accept your terms. You must accept..." Because I was at that time young man, puffed-up, no brain, no sober brain. They were so attracted with me. They would have given later on all facilities, but I did not accept. Similarly, Smith Stanstreet, they were also very good company.
1976 Conversations and Morning Walks
Prabhupāda: This body, although I have got this body, and the dog has got the body, or the hog has got the body, but these bodies are not meant for being spoiled like the dogs and hogs. The hog is also whole day working to find out where is stool. So if you also work whole day and night for our sense gratification, then where is the difference between the hog's life and my life. The human life, human brain should be sober to understand what is the problem of life, why I'm subjected to so many tribulations, how to remedy, how to find out the remedy and that requires tapasya.
No, no education... That is waste of... For such boys who are not interested, why they should be enforced, education? They are not meant for that. Education is for higher brain, sober brain. And not that everyone has to become literate. It is not required. He can do other work.
1977 Conversations and Morning Walks
Prabhupāda: Brain means proper intelligence. That is brain. Dhīra, sober, that is brain. Anyone who has got brain, he will understand the simple logic, that how the body is changing. There is something; therefore body's changing from childhood to boyhood. And as soon as that important thing is missing—no more change of body. It is a dead matter. So where is your brain to understand this simple truth?
Prabhupāda: Dhīra means who is restful, not restless; dhīra, whose brain is cool, sober. Just like a high-court judge. He is sitting simply, and the cāparāsī, he is busy. The cāparāsī gets, say, two hundred rupees, and he gets five thousand rupees. But he is doing nothing, a dhīra, 'cause his importance is many, many times greater than the cāparāsī. So dhīra means sober. If we become sober, not restless, then it is possible to understand. Dhīras tatra na muhyati. There are two classes: dhīra and adhīra. Adhīra means always foolishly busy, and dhīra means sober. He's trying to understand what is God. That is dhīra.