If one cannot enjoy reading a book over and over again, there is no use in reading it at all.

A child educated only at school is an uneducated child.

Know what you are talking about.

One test of the correctness of educational procedure is the happiness of the child.

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.

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

It is beyond a doubt that all our knowledge begins with experience.

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

Just when I thought there wasn't room enough for another thought in my head, I had this great idea.

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.

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.

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

Necessity is the mother of invention.

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.

Imagination is more important than knowledge.

Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.

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

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

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

I have just three things to teach: simplicity, patience, compassion. These three are your greatest treasures.

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