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

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

Courage, conviction and confidence.

A child educated only at school is an uneducated child.

Education is the kindling of a flame, not the filling of a vessel.

The progressive development of man is vitally dependent on invention.

Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.

A thought is an idea in transit.

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

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

I am indebted to my father for living, but to my teacher for living well.

Necessity is the mother of invention.

Men are born ignorant, not stupid. They are made stupid by education.

There is no authority who decides what is a good idea.

My weapon is literature

A witty saying proves nothing.

Educate the children and it won't be necessary to punish the men.

Suddenly degrees aren't worth anything. Isn't that true? When I was a student, if you had a degree, you had a job. If you didn't have a job it's because you didn't want one. And I didn't want one, frankly.

Dare to think for yourself.

Learning never exhausts the mind.

Real knowledge is to know the extent of one's ignorance.