Controlling complexity is the essence of computer programming.
The purpose of software engineering is to control complexity, not to create it.
Simplicity is prerequisite for reliability.
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.