The purpose of psychology is to explain how we manage to live.
心理学的目的是解释我们如何设法生活。
"We look at the world once, in childhood. The rest is memory."
The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.
"Ein Buch ist wie ein Garten, den man in der Tasche trägt."
真相很少是纯粹的，也从不简单。
The best way to predict the future is to create it.
追求数学知识是一场永无止境的冒险。