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"Men do not care how nobly they live, but only how long, although it is within the reach of every man to live nobly, but within no man's power to live long."

"The best ideas are common property."

"If one does not know to which port one is sailing, no wind is favorable."

"It is pleasant at times to play the madman."

"As was his language so was his life."

"Luck is what happens when preparation meets opportunity."

"If you are ruled by mind you are a king; if by body, a slave."

"Philosophy and the subjects known as 'humanities' are still taught almost as if Darwin had never lived. No doubt this will change in time."

"We cannot live only for ourselves. A thousand fibers connect us with our fellow men; and among those fibers, as sympathetic threads, our actions run as causes, and they come back to us as effects."

"Boredom, after all, is a form of criticism."

"A kleptomaniac is a person who helps himself because he can't help himself."

"A divine falsehood is more powerful than any human truth."