出自《海国图志序》。善于学习外国的长处，就能够征服外国;不善于学习外国的长处就会被外国所征服。

Growth comes from taking risks, but calculated ones.

行为主义者对人类行为的兴趣不仅仅是旁观者的兴趣——他想要控制人类的反应，就像物理科学家想要控制和操纵其他自然现象一样。

我不是黑帮分子，我远非如此。

To live is the rarest thing in the world. Most people exist, that is all.

The study of truth requires a considerable effort - which is why few are willing to undertake it out of love of knowledge - despite the fact that God has implanted a natural appetite for such knowledge in the minds of men.

有时候最难的事情和最正确的事情是同一件事。