If I go to heaven I want to take my reason with me.

If abuses are destroyed, man must destroy them. If slaves are freed, man must free them. If new truths are discovered, man must discover them. If the naked are clothed; if the hungry are fed; if justice is done; if labor is rewarded; if superstition is driven from the mind; if the defenseless are protected, and if the right finally triumphs, all must be the work of man. The grand victories of the future must be won by man, and by man alone.

Only those who live on the labor of the ignorant are the enemies of science. Real love and real religion are in no danger from science. The more we know the safer all good things are.

Fear paints pictures of ghosts and hangs them in the gallery of ignorance.

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.

There is only one way to be happy, and that is to make somebody else so, and you cannot be happy by going cross lots; you have got to go the regular turnpike road.

The ideas of right and wrong change with the experience of the race, and this change is wrought by the gradual ascertaining of consequences - of results.