和平时期流汗越多，战争时期流血越少。

Behind every technological breakthrough is the accumulation of countless failures.

On pivoting: "If you're not stubborn， you'll give up on experiments too soon. And if you're not flexible， you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve."

心理生活是一个整体这一普遍说法可以被接受为真，但它并没有太大帮助。