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

The only true wisdom is in knowing you know nothing.

Science is a way of thinking much more than it is a body of knowledge.

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

He who would learn to fly one day must first learn to stand and walk and run and climb and dance; one cannot fly into flying.

The most savage controversies are those about matters as to which there is no good evidence either way.

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

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

Human behavior flows from three main sources: desire, emotion, and knowledge

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.

My alma mater was books, a good library.... I could spend the rest of my life reading, just satisfying my curiosity.

An investment in knowledge pays the best interest.

I had rather excel others in the knowledge of what is excellent, than in the extent of my power and dominion

I like poems you can tack all over with a hammer and there are no hollow places.

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

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

Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.

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

Necessity is the mother of invention.

The progressive development of man is vitally dependent on invention.

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