Caller: Yes. Swami, you say you have to know yourself. Now, how does a person go about knowing when he knows himself, who he is and what he is. In other words, when does he reach the stage where he says, "Hah! I know where I am and what I am."
Prabhupāda: Yes, there are two different processes of acquiring knowledge. One process is to research oneself by his own endeavor, by his limited sense speculation. And another process is to know from the authority. Just like deductive process, we say, man is mortal. This knowledge is received from higher authorities, just like our teacher or parents, we understand that man is mortal. Another process is one can make research whether actually man is mortal.