我从不买任何东西，除非我能给自己一个充分的理由为什么要买它。
I never buy anything unless I can give myself a good reason why I should buy it.
They just keep trotting back and forth across the bridge thinking there is something better on the other side. If they'd hang head down at the top of the thing and wait quietly, maybe something good would come along. But no—with men it's rush, rush, rush, every minute. I'm glad I'm a sedentary spider.
数学的本质在于它的自由。
离别多年后，抑或再相逢。相逢何所语，泪流默无声。