The first principle is that you must not fool yourself and you are the easiest person to fool.

It is possible to fly without motors, but not without knowledge and skill.

It is not enough for the teacher to love the child. She must first love and understand the universe. She must prepare herself, and truly work at it.

Common sense is the collection of prejudices acquired by age eighteen.

Make it a rule never to give a child a book you would not read yourself.

If you can't explain it simply, you don't understand it well enough.

Most people have never learned that one of the main aims in life is to enjoy it.

A cynic is a man who knows the price of everything, and the value of nothing.

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

If you're not learning while you're earning, you're cheating yourself out of the better portion of your compensation.

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

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

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.

If I could explain it to the average person, I wouldn't have been worth the Nobel Prize.

It isn't what we don't know that gives us trouble, it's what we know that ain't so.

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

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

Any sufficiently advanced technology is indistinguishable from magic.

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

What sculpture is to a block of marble, education is to a human soul.

No man's knowledge here can go beyond his experience.