Albert Einstein:

WE CANNOT SOLVE OUR PROBLEMS WITH THE SAME THINKING WE USED WHEN WE CREATED THEM.
我們無法在同樣階層的思考下得到問題的解答，反覆地想不一定有用，要接受其他刺激產生跳脫性才會有創意的解答。

THINGS SHOULD BE AS SIMPLE AS POSSIBLE BUT NOT SIMPLER.
= "A thing should be as simple as it can be, and still serve its purpose".