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

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.

If you're not learning while you're earning, you're cheating yourself out of the better portion of your compensation.

The books that the world calls immoral are books that show the world its own shame.

Books are for people who wish they were somewhere else.

Courage, conviction and confidence.

If you can't explain it simply, you don't understand it well enough.

Don't learn to do, but learn in doing.

All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.

A thought is an idea in transit.

Knowledge is power. Information is liberating. Education is the premise of progress, in every society, in every family.

What we know is a drop, what we don't know is an ocean.

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

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

When I am attacked by gloomy thoughts, nothing helps me so much as running to my books. They quickly absorb me and banish the clouds from my mind.

I had rather excel others in the knowledge of what is excellent, than in the extent of my power and dominion

You can never learn less, you can only learn more.

Words can be like X-rays if you use them properly - they'll go through anything. You read and you?re pierced.

My weapon is literature

If you want the present to be different from the past, study the past.

The ability to observe without evaluating is the highest form of intelligence.