Books are as useful to a stupid person as a mirror is useful to a blind person.
Most people have never learned that one of the main aims in life is to enjoy it.
All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.
To educate a person in the mind but not in morals is to educate a menace to society.
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.
The first principle is that you must not fool yourself and you are the easiest person to fool.
In mathematics you don't understand things. You just get used to them.
Science is a rising force, It is creating a new world about us. It needs to be watched and pressed into service, and in any case, it would be courting disaster to ignore it.
A cynic is a man who knows the price of everything, and the value of nothing.
Education is a system of imposed ignorance.
Industrialize or perish.
Intelligence plus character-that is the goal of true education.
Human behavior flows from three main sources: desire, emotion, and knowledge
Evil being the root of mystery, pain is the root of knowledge.
They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance.
I like poems you can tack all over with a hammer and there are no hollow places.
I have no special talents. I am only passionately curious.
My weapon is literature
If you can't explain it simply, you don't understand it well enough.
Knowing others is wisdom, knowing yourself is Enlightenment.
Common sense is the collection of prejudices acquired by age eighteen.