Don't worry that children never listen to you; worry that they are always watching you.

The reading of all good books is like conversation with the finest men of past centuries.

If I could explain it to the average person, I wouldn't have been worth the Nobel Prize.

God created man in His own image, says the Bible; philosophers reverse the process: they create God in theirs.

I cannot teach anybody anything. I can only make them think

Books are for people who wish they were somewhere else.

I like poems you can tack all over with a hammer and there are no hollow places.

Learning never exhausts the mind.

For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.

A cynic is a man who knows the price of everything, and the value of nothing.

With educated people, I suppose, punctuation is a matter of rule; with me it is a matter of feeling. But I must say I have great respect for the semi-colon; it's a useful little chap.

Science is what we have learned about how to keep from fooling ourselves.

Evil being the root of mystery, pain is the root of knowledge.

I decided to teach because I think that any person who studies philosophy has to be involved actively.

Education is the ability to listen to almost anything without losing your temper or your self-confidence.

A little knowledge that acts is worth infinitely more than much knowledge that is idle.

Investigate, educate and organize.

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.

Books are as useful to a stupid person as a mirror is useful to a blind person.

There is nothing more awful, insulting, and depressing than banality.

Any knowledge that doesn't lead to new questions quickly dies out: it fails to maintain the temperature required for sustaining life.