If there is any principle of the Constitution that more imperatively calls for attachment than any other it is the principle of free thought, not free thought for those who agree with us but freedom for the thought that we hate.

To rest upon a formula is a slumber that, prolonged, means death.

Knowledge-it excites prejudices to call it science-is advancing as irresistibly, as majestically, as remorselessly as the ocean moves in upon the shore.

I like to pay taxes. With them, I buy civilization.

Modesty and reverence are no less virtues of freemen than the democratic feeling which will submit neither to arrogance nor to servility.

I think it not improbable that man, like the grub that prepares a chamber for the winged thing it never has seen but is to be - that man may have cosmic destinies that he does not understand.

Imitation is a necessity of human nature.