So knowledge means to know only that Krishna is the Proprietor of everything, that Krishna is the Friend of everyone, and that Krishna is the Enjoyer of everything. These three things: Proprietor, Friend, and Enjoyer. If somebody knows this, he is actually wise. Therefore because the devotee always knows this, he is more superior person because he has got all knowledge. But even more important than the knowledge of Krishna is the acting upon that knowledge, or devotional service. By the acting he realizes his knowledge and becomes complete.”
(Srila Prabhupada Letter, March 5, 1972)