心理学必须基于事实，而非假设。

国际体系的无政府性质意味着国家必须依靠自助来确保其生存。

投机把你引向错误的道路。它允许你把你的情绪放在第一位，而投资则把情绪排除在外。

Positive psychology is as concerned with strength as with weakness, as interested in building the best things in life as in repairing the worst.

忠于自己，永远不要让任何人削弱你的光芒。