《汉书·传·王商史丹傅喜传》
史丹进谏说： 凡是被称为有才能的人，应当聪敏而又喜好学习，温习旧业，增加新知，是皇太子做到的。
丹进曰： 凡所谓材者，敏而好学，温故知新，皇太了是也。
Shi Dan remonstrated, saying: Everyone who is called talented should be intelligent and love to learn, review old knowledge, and gain new knowledge, which is what the crown prince has done.