我们习惯于这样衡量人：爱夸赞人的是虚伪的；爱挑错的人是真诚的。后者难能可贵，所以有成语“闻过则喜”、“攻错之谊”等等。我们是那么怕吃亏上当，以致神经过敏，听到赞美自己的话，就疑之入骨；同时留心自己绝不轻易称赞别人，免得落下“嘴儿甜”之坏印象。因为“嘴地甜 We are accustomed to measuring people like this: people who love praising are hypocritical; people who love being wrong are sincere. The latter is commendable, so idioms “smell good”, “attack the wrong friendship” and so on. We are so afraid to suffer frivolous, so nervous, to hear the praise of their own words, the suspicion; at the same time be careful not to readily praise others, so as not to drop the “sweet mouth” of the bad impression. Because "sweet mouth