Real learning comes about when the competitive spirit has ceased.

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

Imagination is the source of every form of human achievement. And it's the one thing that I believe we are systematically jeopardizing in the way we educate our children and ourselves.

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

It is beyond a doubt that all our knowledge begins with experience.

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

No power and no treasure can outweigh the extension of our knowledge.

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

Science is not only a disciple of reason but, also, one of romance and passion.

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

When you know better you do better.

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

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

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.

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

I am indebted to my father for living, but to my teacher for living well.

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

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.

Just because I don't care doesn't mean I don't understand.

Reading is to the mind what exercise is to the body.

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