Everything should be made as simple as possible, but not simpler.

Realize that everything connects to everything else.

There's a dark side to everything.

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.

Insanity is doing the same thing, over and over again, but expecting different results.

If you can't explain it to a six year old, you don't understand it yourself.