It is possible to fly without motors, but not without knowledge and skill.

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.

Books are for people who wish they were somewhere else.

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

Reading without reflecting is like eating without digesting.

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.

If I could explain it to the average person, I wouldn't have been worth the Nobel Prize.

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

The reading of all good books is like conversation with the finest men of past centuries.

The only good is knowledge and the only evil is ignorance.

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

Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.

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

Courage, conviction and confidence.

Technology is just a tool. In terms of getting the kids working together and motivating them, the teacher is the most important.

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

In order to stave off covetouness, greed, and spite, citizens world over must be educated.

I do not know how to teach philosophy without becoming a disturber of the peace.

A child educated only at school is an uneducated child.

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

It is not enough for the teacher to love the child. She must first love and understand the universe. She must prepare herself, and truly work at it.