You must be fully equipped with knowledge. The Bhagavad-gita is there, the Srimad-Bhagavatam is there. Now we are publishing other books also, Teachings of Lord Caitanya. So read them…if you read, you become fully qualified with knowledge. And vijnanam: apply them in your practical life. And astikyam, in full faith of the procedures and in Krsna. That will make you successful.
[Srila Prabhupada, Initiation lecture, San Francisco, 24 March, 1968]