"The only thing necessary for the triumph of evil is for good men to do nothing."

Let us try to teach generosity and altruism, because we are born selfish.

Happiness is a gift and the trick is not to expect it, but to delight in it when it comes.

The best designs come from understanding natural laws.

The main task in life is simply this: to identify and separate matters so that I can say clearly to myself which are externals not under my control, and which have to do with the choices I actually control.

The tobacco industry must evolve, not just for compliance, but for long-term relevance.

在这种人人对人人的战争中，还有一种后果；没有什么可以不公正。对于权利和错误、正义和不正义的概念在那里无所适从。没有共同的权力，就没有法律；没有法律，就没有不公正。

社会可以并且确实执行自己的命令，如果它发布错误的命令，而不是正确的，或者在不应该干涉的事情中发布任何命令，那么它实际上在实践一种比许多政治压迫更可怕的社会暴政，尽管通常不受到如此极端的惩罚支持，但它留下的逃脱手段更少，深入到生活的细节中，甚至奴役了灵魂本身。