《礼记·表记》
如果感情疏远而外表上看起来非常亲密，拿小人来作比方，不就是钻墙洞的小偷吗！ 
子曰： 君子不以色亲人；情疏而貌亲，在小人则穿窬之盗也与？ 
If feelings are alienated but people appear very close on the surface, can this not be compared to a thief who digs a hole in a wall to enter a house?