Psychological theories must pass the test of practical experience.

"Traveling is a brutality. It forces you to trust strangers and to lose sight of all that familiar comfort of home and friends. You are constantly off balance. Nothing is yours except the essential things: air, sleep, dreams, the sea, the sky - all things tending towards the eternal or what we imagine of it."

死亡之所以紧紧跟随生命，不是因为生物学的必然性，而是因为嫉妒。生命如此美丽，以至于死亡爱上了它，这是一种嫉妒的、占有欲强烈的爱，它会抓住它能抓住的一切。

像明天就要死去一样活着，像永远活着一样学习。

我们都有各自的命运。没有事情随随便便发生，都是计划的一部分。