“我们唯一需要害怕的就是害怕本身。”
"The only thing we have to fear is fear itself."
The best way to refactor a program is to refactor it.
The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.
钓鱼的人躬着身子，不是要对鱼恭恭敬敬；用虫子作为诱饵捕鼠，也不是因为喜爱老鼠。