Faith in the supernatural is a desperate wager made by man at the lowest ebb of his fortunes.

To be boosted by an illusion is not to live better than to live in harmony with the truth ... these refusals to part with a decayed illusion are really an infection to the mind.

Philosophy may describe unreasoning, as it may describe force; it cannot hope to refute them.

America is a young country with an old mentality.

Prayer, among sane people, has never superseded practical efforts to secure the desired end.

To be happy you must have taken the measure of your powers, tasted the fruits of your passion, and learned your place in the world.

...science is nothing but developed perception, interpreted intent, common-sense rounded out and minutely articulated. It is therefore as much an instinctive product, as much a stepping forth of human courage in the dark, as is any inevitable dream or impulsive action.