The whole subject matter of Bhagavad-gita is to know who is the proprietor of this body. Generally everyone, ninety-nine-point-nine percent, everyone knows that "I am this body," but that is not the fact. The owner of the body: one who knows that "I am not this body, but I am the proprietor of the body." Just like I am sitting on this throne. I am not this throne, but I am a different person who is sitting on the throne. Similarly, when somebody asks me, "What you are?" if I give my identification with this body, that is my foolishness.
Lecture on Bhagavad-gita 13.1-2, Bombay, 25 September, 1973