Concerning your questions raised, the process is simply to hear from authority and accept it. From the Bhagavad-gita we can understand Krishna because He is explaining Himself. What is the difficulty to understand? There is somebody Superior in all aspects of material activities. The sun rises exactly on time, the seasons changing, fruits appearing, and flowers. There is no change in the law of nature. Don't you think that there is a Superior Being managing these things? Why not accept this proposal. It is no explanation that it is simply accident that all these things are going on so nicely.
Letter to Mr. Prem J. Batra, 2 April, 1976