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

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

Better know nothing than half-know many things.

Education is an ornament for the prosperous, a refuge for the unfortunate.

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

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

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

Many much-learned men have no intelligence.

A man who has never gone to school may steal a freight car; but if he has a university education, he may steal the whole railroad.

Necessity is the mother of invention.

It is beyond a doubt that all our knowledge begins with experience.

Real learning comes about when the competitive spirit has ceased.

Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.

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

The fullness of knowledge only comes through the awareness of ignorance.

Courage, conviction and confidence.

Education is the most powerful weapon which you can use to change the world.

The books that the world calls immoral are books that show the world its own shame.

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

I cannot live without books.

There is one quality which one must possess to win, and that is definiteness of purpose, the knowledge of what one wants, and a burning desire to possess it.