A child educated only at school is an uneducated child.

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

Real learning comes about when the competitive spirit has ceased.

A witty saying proves nothing.

If the facts don't fit the theory, change the facts.

Knowledge is power. Information is liberating. Education is the premise of progress, in every society, in every family.

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

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

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

I cannot live without books.

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

For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.

Physics is like sex: sure, it may give some practical results, but that's not why we do it.

Know what you are talking about.

You can never be overdressed or overeducated.

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

Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.

When you know better you do better.

The fullness of knowledge only comes through the awareness of ignorance.

Books are for people who wish they were somewhere else.

There is nothing more awful, insulting, and depressing than banality.