《论衡》里记载这么一个故事:昔周人有仕数不遇,年老白首,泣涕于涂者。人或问之:“何为泣者?”对曰:“吾仕数不遇,自伤年老失时,是以泣也。”人曰: “仕奈何不一遇也?”对曰:“吾年少时,学为文,文德成就,始欲仕宦,人君好用老;用老主亡, 后主又用武,吾更为武,武节始就,武主又亡;少主始立,好用少年,吾年又老,是以未尝一遇。” “Lun Heng” records such a story: in the past few weeks there is no official number, the old man, tears in Tu. Man or asked: “What is a weeping person?” Said: “I do not count the number of cases, from the age of the old lost, weep also.” Man said: When I was a young man, I learned a lot from Wen and Wendeng as a result of my studies. When I was a man, I was very good at using old men. On the other hand, Legislative, easy to use juveniles, my age is old, it is not a chance. "