I think that kids have a greater capacity for processing things than we give them credit for.

Necessity is the mother of invention.

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

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

When you know better you do better.

Learning never exhausts the mind.

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

It took us three years to build the NeXT computer. If we'd given customers what they said they wanted, we'd have built a computer they'd have been happy with a year after we spoke to them - not something they'd want now.

There is no authority who decides what is a good idea.

Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.

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

The whole of science is nothing more than a refinement of everyday thinking.

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

Any knowledge that doesn't lead to new questions quickly dies out: it fails to maintain the temperature required for sustaining life.

Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.

The only true wisdom is in knowing you know nothing.

If help and salvation are to come, they can only come from the children, for the children are the makers of men.

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

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

My alma mater was books, a good library.... I could spend the rest of my life reading, just satisfying my curiosity.

You can never be overdressed or overeducated.