This occupational duty is in connection with the body. That is not eternal. Suppose this life I've got a body, human body or Brāhmiṇ body or a son in the Rockefeller family, and according to that body I have got a particular type of duty, standard of living. Deha-yogena dehinām (SB 7.6.3). But as soon as the body's changed—I get another body—the whole duty changed. Now I may have a very comfortable body, American body, Rockefeller family body, but next life, according to my karma, we are preparing our next life.
Suppose if I get the body of a dog, then my occupational duty will be "Gow! Gow!" Because according to the body the duty is changed. So these occupational duties, they are not permanent. But I am eternal, na hanyate hanyamāne śarīre (BG 2.20). By the destruction of this body, I am not destroyed. I remain, I simply enter another body. I, as spirit soul, I remain. Just like I'm entering different bodies in this life. I was a child, I enter another body.
Just like this small child, Sarasvatī. According to the body, she is acting. She's acting sometimes nonsense, but we take it delight, because she is child. But the same nonsense if I do in another body, a grown-up body, that will be ridiculous. In this child body, she is naked, but people enjoy it. But when she is grown up and she is ladylike, she is young girl, if she becomes naked, oh, that is ridiculous. So here in this life also we see according to the change of the body, the duty is changing, the activities are changing.
So, this body is changing, that's a fact. Tathā dehāntara-prāptiḥ dhīras tatra na muhyati (BG 2.13). Just like in this life we are changing different types of bodies, similarly, dehāntara-prāptiḥ, another body. These rascals, they do not understand the simple reasoning. Simple logic they cannot understand—still they argue, "What is the proof there is transmigration of the soul?" Here is the proof. Now this child, Sarasvatī, when she is a grown-up lady she'll not act like that. But everyone will accept her, Sarasvatī, the same character. Her father, mother, relatives, everything there: Sarasvatī has got another body.
So what is the difficulty to understand this logic, that the soul is immortal and the body is changing? What is the difficulty? Just try to understand. You have to preach immortality of the soul, transmigration of the soul. What is the difficulty? Simple logic. What is the difficulty? Can anyone say? No difficulties? Will you be able to convince others?
Nara-Nārāyaṇa: I think people will argue that just because a child develops to a certain stage, what is the indication that he will develop after that stage? In other words, if I go from birth, youth, old age, then what is to say that I am again going to youth? They will say: "What is that logic? How I will go again to youth? Simply I will go again and vanish away," or something like that. They do not know . . .
Prabhupāda: No, that example is given. Just like this garment I am using. So when it becomes too old, torn or something, so I will throw it away—I take another. What is the difficulty? When this body I am growing or changing, whatever the Christians say, but when it is no more workable, I give it up; I take another. What is the difficulty?
Nara-Nārāyaṇa: The materialistic man will think, "Well, I am voluntarily giving up my clothing, but I'm involuntarily giving up my body." And the mode . . .
Prabhupāda: Voluntarily, involuntarily, that is another thing. Just like a child does not know that his coat is useless, but mother comes and changes the garment. Therefore it is changing. That's a fact. It doesn't matter whether you are changing voluntarily or involuntarily; that is not very important thing. You are changing. That's a fact. Yes?
Tamāla Kṛṣṇa: What they will argue, perhaps, materialists may argue that, "We can see that Sarasvatī is changing from the time she was a little girl and now she is a little older, we have seen her both times, but at the time of death we have not seen the next body of anyone.
Prabhupāda: But why do you believe so much your rascal eyes? That is the answer. Do you think that your eyes are perfect? There are many types of seeing. Not that simply with glaring eyesight you can see. You can see what is Sarasvatī , you are seeing the body. What is Sarasvatī, do you know? So what you are seeing?
You are seeing the body. So what is the power of your seeing? There is another body, suka body, subtle body. Can you see the mind? But everyone has got mind. Can you see intelligence? But everyone has got intelligence. So what is the power of your seeing? Why you are so much proud of your seeing, nonsense seeing?
Devotee (1): If our seeing is imperfect, we can see the change of body but we cannot see change, the transmigration of the soul.
Prabhupāda: You cannot see anything. Your power of seeing is so limited that you cannot see anything. Therefore you have to see through Kṛṣṇa, through Bhagavad-gītā. You are seeing the sun just like a disc. But when you see through astronomy, then you will understand it is fourteen hundred thousand times bigger than this earth. So what is the power of your seeing? Why you are so much proud of seeing? This is nonsense.