The first idea the child must acquire is that of the difference between good and evil.

The most savage controversies are those about matters as to which there is no good evidence either way.

You can never be overdressed or overeducated.

A man who has never gone to school may steal a freight car; but if he has a university education, he may steal the whole railroad.

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

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

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

There is nothing more notable in Socrates than that he found time, when he was an old man, to learn music and dancing, and thought it time well spent.

My alma mater was books, a good library.... I could spend the rest of my life reading, just satisfying my curiosity.

Knowledge becomes evil if the aim be not virtuous.

All stable processes we shall predict. All unstable processes we shall control.

Education is a human right with immense power to transform. On its foundation rest the cornerstones of freedom, democracy and sustainable human development.

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

The fullness of knowledge only comes through the awareness of ignorance.

Liberty without Learning is always in peril and Learning without Liberty is always in vain.

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

The only true wisdom is in knowing you know nothing.

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

The most important part of teaching is to teach what it is to know.

Investigate, educate and organize.

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