When I became convinced that the universe is natural, that all the ghosts and gods are myths, there entered into my brain, into my soul, into every drop of my blood the sense, the feeling, the joy of freedom. The walls of my prison crumbled and fell. The dungeon was flooded with light and all the bolts and bars and manacles became dust.

Every church pretends to have found the exact truth. This is the end of progress. Why pursue that which you have? Why investigate when you know? Every creed is a rock in running water: humanity sweeps by it. Every creed cries to the universe, "Halt!" A creed is the ignorant Past bullying the enlightened Present. The ignorant are not satisfied with what can be demonstrated. Science is too slow for them, and so they invent creeds. They demand completeness. A sublime segment, a grand fragment, are of no value to them. They demand the complete circle... the entire structure.

I am anxious to give away information, for it is only by giving it away that you can keep it. When you have told it, you remember it. It is with information as it is with liberty, the only way to be dead sure of it is to give it to other people.

Music expresses feeling and thought, without language; it was below and before speech, and it is above and beyond all words.

If priests had not been fond of mutton, lambs never would have been sacrified to god. Nothing was ever carried to the temple that the priest could not use, and it always happened that god wanted what his agents liked.

To know that the Bible is the literature of a barbarous people, to know that it is uninspired, to be certain that the supernatural does not and cannot exist - all this is but the beginning of wisdom.

By nature all people are alike, but by education become different