Books! I dunno if I ever told you this, but books are the greatest gift one person can give another.

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

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

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.

Education is a human right with immense power to transform. On its foundation rest the cornerstones of freedom, democracy and sustainable human development.

All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.

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

In mathematics you don't understand things. You just get used to them.

The most savage controversies are those about matters as to which there is no good evidence either way.

Books are for people who wish they were somewhere else.

The progressive development of man is vitally dependent on invention.

The real solution lies in a world in which charity will have become unnecessary.

To every action there is always an equal and opposite or contrary, reaction

Know what you are talking about.

Educate the children and it won't be necessary to punish the men.

Education is our passport to the future, for tomorrow belongs to the people who prepare for it today.

You can never be overdressed or overeducated.

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

If I have seen further it is by standing on the shoulders of Giants.

Don't worry that children never listen to you; worry that they are always watching you.

I like poems you can tack all over with a hammer and there are no hollow places.