An investment in knowledge pays the best interest.

Many much-learned men have no intelligence.

Imagination is more important than knowledge.

The books that the world calls immoral are books that show the world its own shame.

Knowing others is wisdom, knowing yourself is Enlightenment.

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

What is freedom of expression? Without the freedom to offend, it ceases to exist.

They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance.

Civilization is a race between disaster and education.

Action not backed by knowledge and knowledge not translatable into action, both can not stand the test of time.

Courage, conviction and confidence.

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.

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

If the facts don't fit the theory, change the facts.

The more I read, the more I acquire, the more certain I am that I know nothing.

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.

No man's knowledge here can go beyond his experience.

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

Patience is a virtue, and I'm learning patience. It's a tough lesson.

It is better to know how to learn than to know.

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