Śyāmasundara: He distrusts any kind of authority and says that the only kind of things that we can know for sure are mathematical proofs and immediate sense perceptions. Like we can perceive that there is time and there is space, like that. That is the only knowledge he will admit.
Prabhupāda: And beyond the time and space?
Śyāmasundara: We can't know anything.
Prabhupāda: You cannot, but there is a process. You cannot know; that does not mean beyond the mind is relative time and perception. Just like a small insect, he takes birth in the evening, and from evening to morning, his birth, his marriage, his begetting children, everything is done, and in the morning he dies. There are many insects. They are called diwali pokali. At night they will throng together, in India. So for this insect, it is very difficult to understand that there is another animal which is called man, who has got this duration of his lifetime period in only twelve hours of his life. But the insect cannot go beyond that. Just like when we hear from Bhagavad-gītā that Brahmā lives such-and-such, we disbelieve sometimes. But everything is relative. With your relative body, your duration of life, your knowledge, your perception, everything is relative. So you are teeny human being. What is impossible for you is not impossible for others. He is talking from the relative platform.
Śyāmasundara: Yes. He believes there is only relativity. He doesn't think there's anything absolute.
Prabhupāda: Relativity... He does not believe that there are other things. But as soon as one says relative, the opposite word is absolute; otherwise wherefrom we take this word relative?
Śyāmasundara: Well, his idea is that things only exist in relation with each other.
Prabhupāda: Yes. Then what is the supreme relative?
Śyāmasundara: He doesn't admit any supreme.
Prabhupāda: His knowledge is imperfect.