When men are most sure and arrogant they are commonly most mistaken， giving views to passion without that proper deliberation which alone can secure them from the grossest absurdities.

世界是一个舞台，我们都只是演员。

可持续性不再是一种选择；而是我们都必须承担的责任。

知识的最大敌人不是无知，而是知识的幻觉。

Confidence isn't optimism or pessimism, and it's not a character attribute. It's the expectation of a positive outcome.