需要一颗没有烦恼和恐惧的心才能体验真正的幸福。
The value of an economic model lies in its ability to explain and predict.
The best discoveries often come from unexpected places.
The psychologist must avoid all forms of mental physics.
写作的艺术是发现你真正相信的东西的艺术。
在深冬里，我终于明白，在我内心深处有一个不可战胜的夏天。