I am so clever that sometimes I don't understand a single word of what I am saying.

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.

Knowledge becomes evil if the aim be not virtuous.

When you know better you do better.

Necessity is the mother of invention.

I cannot teach anybody anything. I can only make them think

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

Real learning comes about when the competitive spirit has ceased.

The first idea the child must acquire is that of the difference between good and evil.

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

That men do not learn very much from the lessons of history is the most important of all the lessons that history has to teach.

Never help a child with a task at which he feels he can succeed.

Suddenly degrees aren't worth anything. Isn't that true? When I was a student, if you had a degree, you had a job. If you didn't have a job it's because you didn't want one. And I didn't want one, frankly.

All stable processes we shall predict. All unstable processes we shall control.

The progressive development of man is vitally dependent on invention.

Science is a way of thinking much more than it is a body of knowledge.

A child educated only at school is an uneducated child.

Human behavior flows from three main sources: desire, emotion, and knowledge

The man who does not read good books has no advantage over the man who can't read them.

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

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