Simplicity is prerequisite for reliability.

Hofstadter's Law: It always takes longer than you expect, even when you take into account Hofstadter's law.

Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction.

When working on a problem, think only how to solve it. If the solution is not simple and has no inner beauty such as art, it is wrong.

The key to performance is elegance, not battalions of special cases.