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

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

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

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

Books are as useful to a stupid person as a mirror is useful to a blind person.

Real knowledge is to know the extent of one's ignorance.

They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance.

If you're teaching today what you were teaching five years ago, either the field is dead or you are.

Knowledge, Action, Devotion are complementary to each other.

If you want the present to be different from the past, study the past.

I don't look on poetry as closed works. I feel they're going on all the time in my head and I occasionally snip off a length.

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

With educated people, I suppose, punctuation is a matter of rule; with me it is a matter of feeling. But I must say I have great respect for the semi-colon; it's a useful little chap.

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

Real learning comes about when the competitive spirit has ceased.

A cynic is a man who knows the price of everything, and the value of nothing.

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

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.

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

My weapon is literature

Evil being the root of mystery, pain is the root of knowledge.