Know what you are talking about.

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

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

Although modesty is natural to man, it is not natural to children. Modesty only begins with the knowledge of evil.

Education is a system of imposed ignorance.

Don't learn to do, but learn in doing.

Education is the most powerful weapon which you can use to change the world.

Action not backed by knowledge and knowledge not translatable into action, both can not stand the test of time.

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

Industrialize or perish.

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

The books that the world calls immoral are books that show the world its own shame.

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.

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

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

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

Just because I don't care doesn't mean I don't understand.

When I am attacked by gloomy thoughts, nothing helps me so much as running to my books. They quickly absorb me and banish the clouds from my mind.

I am indebted to my father for living, but to my teacher for living well.

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

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