“I believe that the future of humanity is in the progress of reason through science. I believe that the pursuit of truth, through science, is the divine ideal which man should propose to himself.”

“I believe that all is illusion and vanity outside the treasure of truths slowly accumulated, and which will never again be lost. I believe that the sum of these truths, always increasing, will at l...”

“Keep well that is the half of wisdom and of happiness.”

“Up to this day, there has been no proof of the existence of any intelligence other than the human.”

“If you shut up truth, and bury it underground, it will but grow.”

“I am little concerned with beauty or perfection. I don't care for the great centuries. All I care about is life, struggle, intensity.”

“There is only one God and all atheists will learn that after their deaths”

“Nature is what we know. We do not know the gods of religions. And nature is not kind, or merciful, or loving. If God made me the fabled God of the three qualities of which I spoke: mercy, kindness...”

“Nobody that has seen a baby born can believe in god for a second. When you see your child born, and the panic, and the amount of technology that is saving the life of the two people you love most i...”

“The brown paper bag is the only thing civilized man has produced that does not seem out of place in nature.”

“A heart pulsating in harmony with the circulation of sap and the flow of rivers? A body with the rhythms of the earth in its movements? No. Instead: a mind, shut off from the oxygen of alert senses...”

“Have you noticed how dogs sniff at one another when they meet? It seems to be their nature.- Yes; it's a funny habit.- No, it's not funny; you are wrong there. There's nothing funny in nature, howe...”

“I'm completely in favor of the separation of Church and State. ... These two institutions screw us up enough on their own, so both of them together is certain death.”

“I don't know how you feel, but I'm pretty sick of church people. You know what they ought to do with churches? Tax them. If holy people are so interested in politics, government, and public policy,...”

“I have as much authority as the Pope. I just dont have as many people who believe it.”