《后汉书·列传·左周黄列传》
诏书以周举才学优深，特别策问说 ：我以不德，仰承天统、地统、人统，早起晚睡，想协调大中之道行天下。
诏书以举才学优深，特下策问曰 朕以不德，仰承三统，夙兴夜寐，思协大中。
The imperial edict said that Zhou Ju's talent and learning were profound, and asked him in particular: I am not virtuous, and I look up to the rule of heaven, earth, and man. I get up early and go to bed late, trying to work in harmony with the great and medium way in the world.