Prabhupāda: That Imaṁ vivasvate yogaṁ proktavān aham avyayam (BG 4.1): "This science of Bhagavad-gītā, I spoke to the sun-god millions of years ago." By the calculation it is forty millions of years ago. Now who will believe that, that Kṛṣṇa spoke this Bhagavad-gītā forty millions of years ago to the sun-god? Hmm? Who will believe that? They'll say mythology. So where is the faith in Bhagavad-gītā and faith in the words of Kṛṣṇa? Understanding Hamlet without Hamlet . . . (indistinct) . . . You cannot make your interpretation that whatever is written there, I take instead of . . . I take . . . (coughing) That is not the way of understanding Bhagavad-gītā. Then from the very beginning you'll spoil it. Then what is the meaning of preaching Bhagavad-gītā? If you do not accept the direction of the author, then what right you have got to say that you have understood Bhagavad-gītā?
Guest (Indian man): Could it be that there may be different interpretations?
Prabhupāda: No, that is not possible. That is not the process. You cannot interpret Bhagavad-gītā. If you want to preach Bhagavad-gītā, you must preach what Kṛṣṇa has said. If you have got a different philosophy, you can say differently. You don't cheat people that you take Bhagavad-gītā and interpret in your own way and cheat others and be cheated yourself. You cannot do that.