Be slow to fall into friendship，but when you are in，continue firm and constant.

Beauty is the only thing that time cannot harm.

I write fiction and I'm told it's autobiography, I write autobiography and I'm told it's fiction, so since I'm so dim and they're so smart, let them decide what it is or it isn't.

The most important skill for a computer scientist is problem solving. The ability to formulate problems, think creatively about solutions, and express a solution clearly and accurately.

Illustrations should not just decorate the text; they should expand it.