快乐的情感是来源于与不好的事的对比，而快乐本身并没有任何意义。

You can be the ripest, juiciest peach in the world, and there's still going to be somebody who hates peaches.

Never be satisfied with current achievements, always aim higher.

理解一个句子意味着理解一种语言。

有机体感知的不是刺激，而是环境中的物体。