闲时不烧香，急时抱佛脚。国乱思良将，家贫思贤妻。
在空闲的时候不做准备，危急的时候却临时抱佛脚。国家发生战乱时，才想到有名的将领；家庭贫困时才希望能有个贤惠的妻子。
In mathematics, the art of proposing a question must be held of higher value than solving it.
In the short run, the market is a voting machine but in the long run, it is a weighing machine.
夜晚是启示的时刻。