I strongly believe that missionaries make better products. They care more. For a missionary， it's not just about the business. There has to be a business， and the business has to make sense， but that's not why you do it. You do it because you have something meaningful that motivates you.

No arts; no letters; no society; and which is worst of all, continual fear and danger of violent death; and the life of man, solitary, poor, nasty, brutish, and short.

译文：高兴时说的话大多会丧失信用，愤怒时说的话大多会失大体。赏析：人在得意时容易忘形，说话无所不谈，此时说的话往往失真。人在极度愤怒时，思维混乱，言行大多不理智。所以，我们要防止在高兴时言多有失，防止愤怒时言多失态。

The most sustainable building is the one that is already built.

最深刻的定理往往源于最简单的观察。