There is no question of believe. Don't bring this question-belief. It is law. Just like there is government, you believe or not believe, who cares for you? That is government. Similarly, you believe or not believe, there is God. If you don't believe in God and do independently whatever you like, then you'll be punishable.
-Radio Interview -- July 27, 1976, London

निगमकल्पतरोर्गलितं फलं
शुकमुखादमृतद्रवसंयुतम् ।
पिबत भागवतं रसमालयं
मुहुरहो रसिका भुवि भावुका: ॥ ३ ॥
O expert and thoughtful men, relish Śrīmad-Bhāgavatam, the mature fruit of the desire tree of Vedic literatures. It emanated from the lips of Śrī Śukadeva Gosvāmī. Therefore this fruit has become even more tasteful, although its nectarean juice was already relishable for all, including liberated souls.
-SB 1.1.3