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

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

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

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

Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.

You can never learn less, you can only learn more.

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.

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

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

Imagination is more important than knowledge.

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

The highest result of education is tolerance.

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

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

If there were no bad people, there would be no good lawyers.

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

The only true wisdom is in knowing you know nothing.

I cannot live without books.

Civilization is a race between disaster and education.

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.

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