Physics is like sex: sure, it may give some practical results, but that's not why we do it.

The more I read, the more I acquire, the more certain I am that I know nothing.

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

You can never be overdressed or overeducated.

Civilization is a race between disaster and education.

Action not backed by knowledge and knowledge not translatable into action, both can not stand the test of time.

What is freedom of expression? Without the freedom to offend, it ceases to exist.

I am a part of everything that I have read.

A little knowledge is a dangerous thing. So is a lot.

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

Courage, conviction and confidence.

Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.

Science is a rising force, It is creating a new world about us. It needs to be watched and pressed into service, and in any case, it would be courting disaster to ignore it.

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

Education is a system of imposed ignorance.

The man who is fond of books is usually a man of lofty thought, and elevated opinions.

To every action there is always an equal and opposite or contrary, reaction

The real solution lies in a world in which charity will have become unnecessary.

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

As we acquire more knowledge, things do not become more comprehensible but more mysterious.

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