To the wise man, to the wise nation, the mistakes of the past are the torches of the present.

I am going to put the Bible out of business.

All I have to say is, Love one another - that is the height of all philosophy. It is beyond all religions. It is the secret of joy - the fountain of Perpetual Youth - the only rainbow on life's dark cloud.

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."

I have not the slightest confidence in 'spiritual manifestations.'

An infinite personality is an infinite impossibility.

Where is the soul? . . . I refuse to believe anything of that kind without proof. The idea that, as soon as a man's breath leaves his body, the soul flops out like a chicken's head and flies off into space to find a lodgment where there [are] harps and haloes. Too much for me.