No man of sense in the whole world believes in devils any more than he does in mermaids, vampires, gorgons, hydras, naiads, dryads, nymphs, fairies, the Fountain of Youth, [or] the Philosopher's Stone. . . .

If nobody has too much, everybody will have enough.

Blasphemy is what an old dogma screams at a new truth.

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

The Catholics have a Pope. Protestants laugh at them, and yet the Pope is capable of intellectual advancement. In addition to this, the Pope is mortal, and the church cannot be afflicted with the same idiot forever. The Protestants have a book for their Pope. The book cannot advance. Year after year, and century after century, the book remains as ignorant as ever.

Liberty is the breath of progress.

The true civilization is where every man gives to every other every right that he claims for himself.