The primary purpose of a liberal education is to make one's mind a pleasant place in which to spend one's leisure.

The art of living consists in knowing which impulses to obey and which must be made to obey.

Nobody can be so amusingly arrogant as a young man who has just discovered an old idea and thinks it is his own.

An idealist believes the short run doesn't count. A cynic believes the long run doesn't matter. A realist believes that what is done or left undone in the short run determines the long run.

"Perseverance is the most overrated of traits, if it is unaccompanied by talent; beating your head against a wall is more likely to produce a concussion in the head than a hole in the wall."