Only the very ignorant are perfectly satisfied that they know. To the common man the great problems are easy. He has no trouble in accounting for the universe. He can tell you the origin and destiny of man and the why and wherefore of things.

Logic is not satisfied with assertion. It cares nothing for the opinions of the great; nothing for the prejudices of the many, and least of all for the superstitions of the dead.

If there is a God who will damn his children forever, I would rather go to hell than to go to heaven and keep the society of such an infamous tyrant.

If the Bible and my brain are both the work of the same infinite God, whose fault is it that the book and my brain do not agree?

Every library is an arsenal.

The old lady who said there must be a devil, else how could they make pictures that looked exactly like him, reasoned like a trained theologian - like a doctor of divinity.

Mental slavery is mental death, and every man who has given up his intellectual freedom is the living coffin of his dead soul.