子张曰：“何谓五美？”子曰：“君子惠而不费，劳而不怨，欲而不贪，泰而不骄，威而不猛。”……子张曰：“何为四恶？”子曰：“不教而杀谓之虐；不戒视成谓之暴；慢令致期为之贼；犹之与人也，出纳之吝，谓之有司。”
子张问：“什么是五种美德？”孔子说：“君子对人民施加恩惠，却不耗费财用；使百姓劳苦，百姓却无怨言；自己有所欲求却不贪婪；安宁矜持却不骄横；威严却不凶猛。”……子张又说：“什么是四种恶行？”孔子说：“事先不经教育，犯了罪就杀头叫做肆虐；不先告诫便要求有成效，这叫粗暴；发布命令迟缓，却突然限期完成，这叫残害人；同是给人赏赐，却出手吝啬，这叫只进不出的财务衙门。
The most profound ideas in mathematics often arise from the simplest observations.
预测未来的最好方式是发明它。
The four most dangerous words in investing are: 'this time it's different.'
我们对显而易见的事物视而不见，而且对自己的视而不见也视而不见。
The challenge of our time is to find balance in a world of constant connectivity.
The way to learn about the mind is to reverse-engineer it: to figure out what natural selection designed it to accomplish.
You can’t change the past, but you can shape the future.