When you know better you do better.

It is possible to fly without motors, but not without knowledge and skill.

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

I cannot teach anybody anything. I can only make them think

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

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

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

Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.

What is freedom of expression? Without the freedom to offend, it ceases to exist.

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

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

Necessity is the mother of invention.

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

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.

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

Most people have never learned that one of the main aims in life is to enjoy it.

The whole of science is nothing more than a refinement of everyday thinking.

I have no special talents. I am only passionately curious.

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

The reading of all good books is like conversation with the finest men of past centuries.

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