The history of the world shows that when a mean thing was done, man did it; when a good thing was done, man did it.

It is impossible for me to conceive of a character more utterly detestable than that of the Hebrew god.

Custom meets us at the cradle and leaves us only at the tomb.

I will not attack your doctrines nor your creeds if they accord liberty to me. If they hold thought to be dangerous - if they aver that doubt is a crime, then I attack them one and all, because they enslave the minds of men.

When passions and appetites are stronger than the intellect, men are savages; when the intellect governs the passions, when the passions are servants, men are civilized. The people need education - facts - philosophy.

The priests of one religion never credit the miracles of another religion. Is this because priests instinctively know priests?

Reason, observation, and experience; the holy trinity of science.