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

To read is to fly: it is to soar to a point of vantage which gives a view over wide terrains of history, human variety, ideas, shared experience and the fruits of many inquiries.

Opinion is the medium between knowledge and ignorance.

I learned very early the difference between knowing the name of something and knowing something.

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.

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

Learning gives creativity, Creativity leads to thinking, Thinking provides knowledge, Knowledge makes you great.

Common sense is the collection of prejudices acquired by age eighteen.

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

The only good is knowledge and the only evil is ignorance.

Technology is just a tool. In terms of getting the kids working together and motivating them, the teacher is the most important.

I decided to teach because I think that any person who studies philosophy has to be involved actively.

There is no authority who decides what is a good idea.

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

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.

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

You can never be overdressed or overeducated.

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

If there were no bad people, there would be no good lawyers.

Better know nothing than half-know many things.

Industrialize or perish.