The primary purpose of a liberal education is to make one's mind a pleasant place in which to spend one's leisure.
Nothing is as easy to make as a promise this winter to do something next summer; this is how commencement speakers are caught.
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.
The real danger is not that computers will begin to think like men, but that men will begin to think like computers.
The greatest enemy of progress is not stagnation, but false progress.
When we have 'second thoughts' about something, our first thoughts don't seem like thoughts at all - just feelings.
The whole purpose of education is to turn mirrors into windows.
The two words 'information' and 'communication' are often used interchangeably, but they signify quite different things. Information is giving out; communication is getting through.
The time to relax is when you don't have time for it.
Our dilemma is that we hate change and love it at the same time; what we really want is for things to remain the same but get better.
The three hardest tasks in the world are neither physical feats nor intellectual achievements, but moral acts: to return love for hate, to include the excluded, and to say, "I was wrong".
The most important thing in an argument, next to being right, is to leave an escape hatch for your opponent, so that he can gracefully swing over to your side without too much apparent loss of face.
When you run into someone who is disagreeable to others, you may be sure he is uncomfortable with himself; the amount of pain we inflict upon others is directly proportional to the amount we feel within us.
The beauty of "spacing" children many years apart lies in the fact that parents have time to learn the mistakes that were made with the older ones - which permits them to make exactly the opposite mistakes with the younger ones.
The art of living consists in knowing which impulses to obey and which must be made to obey.