Software is under a constant tension. Being symbolic it is arbitrarily perfectible; but also it is arbitrarily changeable.

你越努力，就越幸运。

One should forgive one's enemies, but not before they are hanged.

你说的话有什么益处呢？如果没有益处还要说，就是白费口舌。 

你无法回到过去改变开头，但你可以从现在开始改变结局。