Without preaching, without understanding philosophy, you cannot keep your strength. Everyone should be thoroughly well conversed with the philosophy which we are putting… That means you must read thoroughly every day. So many books we have got. And Bhagavata is so perfect that any verse you read, you get a new enlightenment. It is so nice. Either Bhagavad-gita or Bhagavata. But it is not ordinary writing.

Srila Prabhupada, Morning Walk — December 12, 1973, Los Angeles