The state of nature has a law of nature to govern it, which obliges every one: and reason, which is that law, teaches all mankind, who will but consult it, that being all equal and independent, no one ought to harm another in his life, health, liberty, or possessions.

Humanity's greatest enemy is itself.

译文：天气不寒冷，地面就不会被冻住，人没有到伤心的时候就不会流泪。赏析：人的言行总是随着外物的变化而变化。不以物喜不以己悲，其实很难做到的。

I believe it's essential to understand the psychology of the market and the psychology of the individual investor.