唯一值得寫的是人類內心與自我的沖突。
The only thing worth writing about is the human heart in conflict with itself.
The joy of solving a mathematical problem is unparalleled; it is a moment of pure intellectual triumph.
God kisses the finite in his love and man the infinite.
當且僅當所有投資者都持有均值-方差有效的投資組合時，市場組合才是有效的。