Liberty is the condition of progress. Without Liberty, there remains only barbarism. Without Liberty, there can be no civilization.

Any doctrine that will not bear investigation is not a fit tenant for the mind of an honest man.

Argument cannot be answered with insults. Kindness is strength; anger blows out the lamp of the mind.

Abraham Lincoln was, in my judgment, in many respects, the grandest man ever President of the United States. Upon his monument these words should be written: "Here sleeps the only man in the history of the world who, having been clothed with almost absolute power, never abused it, except upon the side of mercy."

If there be an infinite Being, he does not need our help - we need not waste our energies in his defense.

If I go to heaven I want to take my reason with me.

The God of Hell should be held in loathing, contempt and scorn. A God who threatens eternal pain should be hated, not loved - cursed, not worshiped. A heaven presided over by such a God must be below the lowest hell.