向高处攀登的奋斗本身足以充实一个人的心灵。必须想象西西弗斯是幸福的。
当最后一棵树被砍倒，最后一美元将失去意义。
The human mind is a set of information-processing machines that were designed by natural selection to solve adaptive problems faced by our hunter-gatherer ancestors.
I don't let the world change my dreams.
君子有三种事应该加以警戒：年轻的时候，血气还没有固定，力戒贪恋女色；到了壮年时期，血气正旺盛，力戒逞强好斗；到了老年时期，血气已经衰弱，力戒贪得无厌。