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

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 bulling the enlightened Present.

Every pulpit is a pillory, in which stands a hired culprit, defending the justice of his own imprisonment.

The first duty of man is to support himself - to see to it that he does not become a burden. His next duty is to help others if he has a surplus, and if he really believes they deserve to be helped.

Reason, observation, and experience; the holy trinity of science.

Some president wishes to be re-elected, and thereupon speaks about the Bible as "the corner-stone of American Liberty." This sentence is a mouth large enough to swallow any church, and from that time forward the religious people will be citing that remark of the politician to substantiate the inspiration of the Scriptures.

Commerce makes friends, religion makes enemies; the one enriches, and the other impoverishes; the one thrives best where the truth is told, the other where falsehoods are believed.