Excerpt from a lecture on Bhagavad-gita Chapter 2 Text 11 given on March 4, 1966 when Srila Prabhupada was living at the yoga studio of Dr. Mishra.
Prabhupada: Just like at Vrndavana, at Vrndavana... That is practical. Now here I am sitting, New York, a very great, the world's greatest city, so magnificent city, but my heart is always hankering after that Vrndavana.
Woman: Yes.
Prabhupada: Yes. I am not happy here.
Woman: Yes, I know.
Prabhupada: I shall be very happy to return to my Vrndavana, that sacred place. "But then why you are...?" Now, because it is my duty. I have brought some message for you people. Because I am ordered by superior, my spiritual master, that "Whatever you have learned, you should go to the Western countries, and you must distribute this knowledge." So in spite of all my difficulties, all my inconveniences, I am here because I am in duty. I, I... That is my personal convenience, if I go and sit down at Vrndavana, I shall be very comfortable there. And I'll be, I'll have no anxiety, nothing of the sort. You see? But I have taken all the risk in the old age because I am in duty-bound. I am in duty-bound. So I have to execute my duty in spite of all my inconveniences. That is the idea.
So this is the whole thing, the whole basic principle of spiritual advancement of knowledge. One should first be convinced that he is not this body. He is not this body. Then other spiritual knowledge will begin. This is the basic principle. You'll find it. You'll find it in the Bhagavad-gita that this situation of spiritual life is called brahma-bhutah. Brahman. So
So the, unless one understands himself, he also cannot understand God also. In his, in his misunderstanding position... Now, what Dr. Mishra is teaching is very nice because he is teaching that "Just first of all you know 'What I am, what I...' " That's very good. But that "what I am" can be known from the Bhagavad-gita also, that "I am not this body. I am not this body." That knowledge, at least theoretically, one must accept, that "I am not this body."

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