"Krsna knows everything, but one cannot know Krsna without being favored by Him. Thus for Krsna and His representative there is no question of a theory of uncertainty certain and is applicable to the past, present and future. Nor is there any uncertainty for one who knows
exactly what Krsna says. The Krsna consciousness movement is based on Bhagavad-gita as it is, as spoken
by Lord Krsna, and for those who are engaged in this movement, there is no question of uncertainty."
Quote From Srila Prabhupada's Srimad Bhagavatam 4.24.42