I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use.

I cannot be angry at God, in whom I do not believe.

Religions are like fireflies. They require darkness in order to shine.

To assert that the earth revolves around the sun is as erroneous as to claim that Jesus was not born of a virgin.

I condemn false prophets, I condemn the effort to take away the power of rational decision, to drain people of their free will - and a hell of a lot of money in the bargain. Religions vary in their degree of idiocy, but I reject them all. For most people, religion is nothing more than a substitute for a malfunctioning brain.

The sciences are not sectarian. People do not persecute each other on account of disagreements in mathematics. Families are not divided about botany and astronomy does not even tend to make a man hate his father and mother. It is what people do not know that they persecute each other about. Science will bring, not a sword, but peace.

I do not believe in the creed professed by the Jewish Church, by the Roman Church, by the Greek Church, by the Turkish (Muslim) Church, by the Protestant Church, nor by any Church that I know of. My own mind is my own Church.

My mother was Southern Irish, and I was brought up as a devout Catholic. In fact, at one point I thought I'd become a priest, but I'd have made an appalling priest anyway... At 16, I asked all these monks some serious questions and they didn't come up with the answers, and I just decided I didn't believe in God.

Our ignorance is God; what we know is science.

A man's ethical behavior should be based effectually on sympathy, education, and social ties and needs; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death.