Know yourself and your limits.
盲人和狼崽
The Blind Man and the Whelp
有个盲人，有一项特殊的本领：无论什么动物放在他手里，他只要摸一下就能辨认出来。一天，有人把一只小狼崽交到他手上。他摸了一下，有些犹豫，说道：“我不敢肯定他是一只小狼还是小狐狸，但是有一点我很明确，那就是千万不可把他放进羊群中。”
邪恶的天性在幼年时期就会显现。
A Blind Man was accustomed to distinguishing different animals by touching them with his hands. The whelp of a Wolf was brought him，with a request that he would feel it，and say what it was. He felt it，and being in doubt，said，“I do not quite know whether it is the cub of a fox，or the whelp of a wolf，but this I know full well. It would not be safe to admit him to the sheepfold.”