If I could explain it to the average person, I wouldn't have been worth the Nobel Prize.

No power and no treasure can outweigh the extension of our knowledge.

The progressive development of man is vitally dependent on invention.

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

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

I do not know how to teach philosophy without becoming a disturber of the peace.

Science is a rising force, It is creating a new world about us. It needs to be watched and pressed into service, and in any case, it would be courting disaster to ignore it.

Those who fail to learn the lessons of history are doomed to repeat them.

A thought is an idea in transit.

A cynic is a man who knows the price of everything, and the value of nothing.

Knowing others is wisdom, knowing yourself is Enlightenment.

I have just three things to teach: simplicity, patience, compassion. These three are your greatest treasures.

Opinion is the medium between knowledge and ignorance.

A witty saying proves nothing.

The real solution lies in a world in which charity will have become unnecessary.

Better know nothing than half-know many things.

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

It took us three years to build the NeXT computer. If we'd given customers what they said they wanted, we'd have built a computer they'd have been happy with a year after we spoke to them - not something they'd want now.

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

All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.

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