宋有富人，天雨牆壞。其子曰：“不築，必將有盜。”其鄰人之父亦云。暮而果大亡其財，其家甚智其子，而疑鄰人之父。

The wall of a wealthy man in Song collapsed after heavy rain. His son admonished him to fix the wall soon; otherwise, some burglars would come. The aged man next door exhorted him to do the same. On the night of that day, the wall-less house suffered from theft as anticipated. The man praised his intelligent son but suspected his neighbor of stealing. 

PS. 親疏有別, 判斷有異.