如果你收養了一隻饑餓可憐的狗，並且讓牠舒適順利，牠將不會咬你，這便是一個人與一隻狗之間最主要的差別。

If you pick up a starving dog and make him prosperous, he will not bite you. This is the principal difference between a dog and a man.

作者：馬克·吐溫