A proof of a proposition is a process the nature of which is such as to produce in us a belief in that proposition.

生活工作首先勤快才能有所闲暇，一切事务都能处理得当才能逍遥自在。

The first draft of anything is shit.

除非一个人在作画前脑海中已有画面，否则他称不上艺术家。