We could never learn to be brave and patient, if there were only joy in the world

One test of the correctness of educational procedure is the happiness of the child.

I like poems you can tack all over with a hammer and there are no hollow places.

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

The deepest sin against the human mind is to believe things without evidence.

What is now proved was once only imagined.

Just because I don't care doesn't mean I don't understand.

The direction in which education starts a man will determine his future in life

I learned very early the difference between knowing the name of something and knowing something.

Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.

Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.

Industrialize or perish.

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

The first principle is that you must not fool yourself and you are the easiest person to fool.

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

Patience is a virtue, and I'm learning patience. It's a tough lesson.

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

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

The knowledge of all things is possible

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

Science is not only a disciple of reason but, also, one of romance and passion.