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

न त्वेवाहं जातु नासं न त्वं नेमे जनाधिपाः ।
न चैव नभविष्यामः सर्वे वयमतः परम् ॥ १२ ॥
Never was there a time when I did not exist, nor you, nor all these kings; nor in the future shall any of us cease to be.
-BG 2.12