If the people were a little more ignorant, astrology would flourish - if a little more enlightened, religion would perish.

Darwin has done more to change human thought than all the priests who have existed.

Epithets are not arguments. Abuse does not persuade.

The church teaches us that we can make God happy by being miserable ourselves.

As we become civilized we are governed less by persons and more by principles. . . . The best of all leaders is the man who teaches people to lead themselves.

If a man would follow, today, the teachings of the Old Testament, he would be a criminal. If he would follow strictly the teachings of the New, he would be insane.

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.