Śyāmasundara: As long as there is imperson, there is doubt, there is unclear, unclear.
Prabhupāda: Unclear.
Śyāmasundara: As soon as there is person, there is no doubt—clear.
Prabhupāda: But we have tried to explain how He is person. Just like we try to explain how God is working. So one should have brain to study things. One must have clear idea how God is person, how He is working, how this cosmic manifestation is manifested by God's energy. Kṛṣṇa says, mayā tatam idaṁ sarvaṁ jagad avyakta-mūrtinā (BG 9.4): "In My impersonal feature, everything is manifested there." Tatam idaṁ sarvam. Īśāvāsyam idaṁ sarvam (ISO 1).
So one has to apply his brain—that is intelligence—how it has become person. That is not false; that is fact. You cannot understand; your brain is teeny. That is different thing. Now you make your brain competent to understand this philosophy.
(break) . . . vijñātaṁ bhavanti. So take this philosophy nicely, understand this philosophy, and preach. You will be victorious everywhere. Because we can challenge anyone. If you know the trick, Kṛṣṇa consciousness, you can challenge. Nārāyaṇa-parāḥ sarve na kutaścana bibhyati (SB 6.17.28). One who is nārāyaṇa-parāḥ, he is never afraid of anything.