It seems to me absurd to doubt that a man may be an ardent Theist and an evolutionist. ... I have never been an atheist in the sense of denying the existence of a God.

Communism begins where atheism begins.

Hegel remarks somewhere that all great, world-historical facts and personages occur, as it were, twice. He has forgotten to add: the first time as tragedy, the second as farce.

I have never seen the slightest scientific proof of the religious ideas of heaven and hell, of future life for individuals, or of a personal God.

By simple common sense I don't believe in God, in none.

Since only what is material is perceptible, knowable, nothing is known of the existence of God.