"So we accept knowledge from such person who knows past, present, and future. Persons who do not know even present, what is going on, how we can accept knowledge from him? This is not our process. Our process is to receive knowledge from a person who knows past, present and future. Just like Kṛṣṇa and the ācāryas. They know. So our knowledge is perfect because we are receiving knowledge from the perfect as it is."
(Srila Prabhupada Lecture, Los Angeles, September 29, 1972)