树枝迎来南北飞鸟，树叶送走往来清风

The history of philosophy is not, like the history of the sciences, to be considered as a mere chronological record of discoveries and errors. It is the history of the human spirit in its endeavor to understand itself and its relation to the universe.

A proof is a way to convince yourself and others that something is true.

向高处挣扎本身足以填满一个人的心灵。人们必须想象西西弗斯是幸福的。

The only performance standard is Zero Defects.