《北史·列传·卷七十二》
对于爱护尊敬的道理，有的则未能具备；哀痛愁思的节操，很少有人能够达到中等这个层次。
其于爱敬之道，则有未能备焉。哀思之节，罕有得其中焉。
For the truth of love and respect, some have not yet acquired it; few people can reach the middle level of the principle of sorrow and sorrow.