As a man develops, he places a greater value upon his own rights. Liberty becomes a grander and diviner thing. As he values his own rights he begins to value the rights of others. And when all men give to all others all the rights they claim for themselves, this world will be civilized.

Intellectual liberty is the air of the soul, the sunshine of the mind, and without it, the world is a prison, the universe is a dungeon.

I would not for my life destroy one star of human hope, but I want it so that when a poor woman rocks the cradle and sings a lullaby to the dimpled darling, she will not be compelled to believe that ninety-nine chances in a hundred she is raising kindling wood for hell.

No man with a sense of humor ever founded a religion.

Meekness is the mask of malice.

I believe in the religion of reason -- the gospel of this world; in the development of the mind, in the accumulation of intellectual wealth, to the end that man may free himself from superstitious fear, to the end that he may take advantage of the forces of nature to feed and clothe the world.

It is hard to overstate the debt we owe to the men and women of genius.