Build a man a fire and he'll be warm for the night. Set a man on fire and he'll be warm for the rest of his life.

Build a man a fire and he'll be warm for the night. Set a man on fire and he'll be warm for the rest of his life.

给他生一堆火，他晚上就会暖和了。把一个人点燃，他的余生都会很温暖。

-- Terry Prachett 特里·普拉切特