Our process is to take knowledge from the authority. We don't bother whether Brahma-saṁhitā was actually written by Brahmā or not. The so-called scholars and anthropologists and... What is called? Archaeologists, they may go on talking, but we have got a very nice process, to receive knowledge through paramparā system, Vedic succession, disciplic succession.
So Caitanya Mahāprabhu, when He was traveling in the southern part of India, south India, Ādikeśava Mandira, there was a temple. Still that temple is there. He found out this Brahma-saṁhitā in handwritten. Formerly, there was no printing press. So any important Vedic literature was being copied. Suppose you have got some copy. I want it, so I borrow from you the book, and I copy in my handwriting or I engage somebody who has got good handwriting. In this way, in Vṛndāvana, still there are so many handmade, handwritten literatures. They have opened one association, one society.