Kuai Kui had a violent temper and would kill people at the drop of a hat. Yan reckoned that if he accepted the post as tutor and let Kuai Kui do as he pleased, the nation would suffer, but Yan knew that if he tried to stop Kuai Kui, he would put his own life at risk. With this dilemma he went to the minister Qu Boyu for advice.
2. 剻性情十分兇暴，動輒殺人，顏闔想：如果做了他的老師而放任他，將來必定亂邦害國；如果約束他，又必然會危及自己的生命，於是他去請教大夫蘧伯玉。