We need men with moral courage to speak and write their real thoughts, and to stand by their convictions, even to the very death.

An infinite God ought to be able to protect Himself, without going in partnership with State Legislatures.

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. . . .

Upon the great questions of origin, of destiny, of immortality, of . . . other worlds, every honest man must say, 'I do not know.' Upon these questions, this is the creed of intelligence.

Life is a narrow vale between the cold and barren peaks of two eternities. We strive in vain to look beyond the heights. We cry aloud

The history of intellectual progress is written in the lives of infidels.

Kindness is the sunshine in which virtue grows.