《旧唐书·列传·卷一百一十》
至于去思虑利禄之有无，计较职位的高低，而忘记自己的才干只适合担任什么职务，指责自己上司的毛病，这犹如质问木匠为何不用小木桩做屋柱、指责医师用昌蒲使人延年益寿而打算推荐猪苓一样的荒谬。  
若夫商财贿之有无，计班资之崇庳，忘己量之所称，指前人之瑕疵，是所谓诘匠氏之不以杙为楹，而訾医师以昌阳引年，欲进其豨苓也。 
As to worrying whether we have a career or not, calculating whether we have a high position or not, forgetting our own talents only fit for this position, and criticizing our superior for his fault, it is as absurd as questioning the carpenter why he does not use small woods as pillars of the house and blaming the doctor for recommending pig-root instead of chang-po. 