All truth, in the long run, is only common sense clarified. - Thomas Henry Huxley

The great end of life is not knowledge but action. Try to learn something about everything and everything about something.

The result is that we have been able to commit, in cold blood and over long periods of time, acts of which the brutes are capable only for brief moments and at the frantic height of Rage, desire, or fear. Because they use and worship symbols, men can become idealists; and, being idealists, they can transform the animal's intermittent greed into the grandiose imperialism of a Rhodes or a JPMorgan; the animal's intermittent love of bullying into Stalinism or the Spanish Inquisition; the animal's intermittent attachment to its territory into the calculated frenzies of nationalism.

Lamarck, sagacious as many of his views were, mingled them with so much that was crude and even absurd, as to neutralize the benefit which his originality might have effected had he been a more sober and cautious thinker...