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

You can never be overdressed or overeducated.

If there were no bad people, there would be no good lawyers.

Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.

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.

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

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

Knowledge becomes evil if the aim be not virtuous.

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

In mathematics you don't understand things. You just get used to them.

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

Never help a child with a task at which he feels he can succeed.

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

The only true wisdom is in knowing you know nothing.

Study without desire spoils the memory, and it retains nothing that it takes in.

I cannot live without books.

No man's knowledge here can go beyond his experience.

Imagination is the source of every form of human achievement. And it's the one thing that I believe we are systematically jeopardizing in the way we educate our children and ourselves.

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

Opinion is the medium between knowledge and ignorance.

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