If you're not learning while you're earning, you're cheating yourself out of the better portion of your compensation.

I think that kids have a greater capacity for processing things than we give them credit for.

It isn't what we don't know that gives us trouble, it's what we know that ain't so.

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

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

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

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

The highest result of education is tolerance.

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.

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

If the facts don't fit the theory, change the facts.

Courage, conviction and confidence.

The task of a writer is not to solve the problem but to state the problem correctly.

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

Necessity is the mother of invention.

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

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

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

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

The schools ain't what they used to be and never was.

You can never learn less, you can only learn more.