Psychological theories must pass the test of practical experience.
如果你想飞翔,就必须放下拖累你的东西。
Happiness is holding someone in your arms and knowing you hold the whole world.
译文:事物众多而智慧有限,有限的智慧不能遍知所有的事物,所以应该顺应事物的本性来治理它们。