你无法预测,但你可以准备。
Quality is free. It's not a gift, but it's free. What costs money are the unquality things -- all the actions that involve not doing jobs right the first time.
"Los monstruos más peligrosos son aquellos que llevamos dentro."
悲剧是我割破了手指。喜剧是你掉进下水道淹死了。