最佳投资机会往往出现在他人恐惧时

The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.

以柳丝榆荚的从容反衬桃李的飘零，暗喻超然物外的态度

引用俗语说明运势变化的无常性。

对工人实际起作用的纪律是由他的顾客施加的。