To every action there is always an equal and opposite or contrary, reaction

I do not know how to teach philosophy without becoming a disturber of the peace.

The first principle is that you must not fool yourself and you are the easiest person to fool.

Science is not only a disciple of reason but, also, one of romance and passion.

I cannot live without books.

Reading without reflecting is like eating without digesting.

It is better to know how to learn than to know.

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

To educate a person in the mind but not in morals is to educate a menace to society.

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.

Know what you are talking about.

Intelligence plus character-that is the goal of true education.

Knowing others is wisdom, knowing yourself is Enlightenment.

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

The highest activity a human being can attain is learning for understanding, because to understand is to be free.

Words can be like X-rays if you use them properly - they'll go through anything. You read and you?re pierced.

A little knowledge that acts is worth infinitely more than much knowledge that is idle.

A spirit of national masochism prevails, encouraged by an effete corps of impudent snobs who characterize themselves as intellectuals.

Industrialize or perish.

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

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