Science is what we have learned about how to keep from fooling ourselves.

Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.

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

To read is to fly: it is to soar to a point of vantage which gives a view over wide terrains of history, human variety, ideas, shared experience and the fruits of many inquiries.

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

The schools ain't what they used to be and never was.

Education is the ability to listen to almost anything without losing your temper or your self-confidence.

The most important part of teaching is to teach what it is to know.

When I am attacked by gloomy thoughts, nothing helps me so much as running to my books. They quickly absorb me and banish the clouds from my mind.

A man who has never gone to school may steal a freight car; but if he has a university education, he may steal the whole railroad.

Necessity is the mother of invention.

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.

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

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

Dare to think for yourself.

Men are born ignorant, not stupid. They are made stupid by education.

Imagination is more important than knowledge.

Knowing is not enough; we must apply. Willing is not enough; we must do.

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

Those who fail to learn the lessons of history are doomed to repeat them.

I am so clever that sometimes I don't understand a single word of what I am saying.