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

Civilization is a race between disaster and education.

Investigate, educate and organize.

The white man is very clever. He came quietly and peaceably with his religion. We were amused at his foolishness and allowed him to stay. Now he has won our brothers, and our clan can no longer act like one. He has put a knife on the things that held us together and we have fallen apart.

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

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.

The secret of life is not enjoyment but education through experience.

The most important part of teaching is to teach what it is to know.

Science is what we have learned about how to keep from fooling ourselves.

Industrialize or perish.

A child educated only at school is an uneducated child.

It is not enough for the teacher to love the child. She must first love and understand the universe. She must prepare herself, and truly work at it.

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

If you can't explain it simply, you don't understand it well enough.

Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.

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

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

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

Study without desire spoils the memory, and it retains nothing that it takes in.

Make it a rule never to give a child a book you would not read yourself.