There are two ways to write error-free programs; only the third one works..

Every program has (at least) two purposes: the one for which it was written and another for which it wasn't..

To understand a program, you must become both the machine and the program..

It is better to have 100 functions operate on one data structure than to have 10 functions operate on 10 data structures..

Don't have good ideas if you aren't willing to be responsible for them..

The best book on programming for the layman is Alice in Wonderland, but that's because it's the best book on anything for the layman..

Fools ignore complexity. Pragmatists suffer it. Some can avoid it. Geniuses remove it..

A language that doesn't affect the way you think about programming is not worth knowing..

One man's constant is another man's variable..

In English every word can be verbed..

Simplicity does not precede complexity, but follows it..

Programmers are not to be measured by their ingenuity and their logic but by the completeness of their case analysis..

Optimization hinders evolution. Everything should be built top-down, except the first time. Simplicity does not precede complexity, but follows it..

I think that it's extraordinarily important that we in computer science keep fun in computing. When it started out, it was an awful lot of fun. Of co….

A year spent in artificial intelligence is enough to make one believe in God..

If a listener nods his head when you're explaining your program, wake him up..

In man-machine symbiosis, it is man who must adjust: The machines can't..

Dealing with failure is easy: Work hard to improve. Success is also easy to handle: You've solved the wrong problem. Work hard to improve..

In software systems it is often the early bird that makes the worm..

A programming language is low level when its programs require attention to the irrelevant..

You think you KNOW when you learn, are more sure when you can write, even more when you can teach, but certain when you can program..