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

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

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

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

What we know is a drop, what we don't know is an ocean.

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

There is nothing more notable in Socrates than that he found time, when he was an old man, to learn music and dancing, and thought it time well spent.

The direction in which education starts a man will determine his future in life

I prefer the company of peasants because they have not been educated sufficiently to reason incorrectly.

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.

Necessity is the mother of invention.

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

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

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

It is what you read when you don't have to that determines what you will be when you can't help it.

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

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

If you're teaching today what you were teaching five years ago, either the field is dead or you are.

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

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

Seek knowledge from the cradle to the grave.