This gentleman is puzzled in his understanding about wherefrom we have come, what we are, and where we are going. But we are certain about it. So if he wants to know all these things, there is bona fide source for understanding these problems, providing he agrees to give a submissive aural reception to the respective authorities as much as he believes in the authoritative statements of Sir Isaac Newton. So either to accept the statements of Sir Isaac Newton or the statements of Lord Krishna, the beginning is a kind of faith. Unfortunately, these so-called scientific men can usually pin their faith on Sir Isaac Newton but not to the statements of Krishna or his representatives. So try to explain to him in this way.
Letter to Govinda dasi, 10 February, 1969