《后汉书·列传·任李万邳刘耿列传》
史官评论道：凡是说到成事的，都是因功劳卓著而容易显声扬名；预谋事的先见的，因事理隐晦而难以昭著。
论曰：凡言成事者，以功著易显；谋几初者，以理隐难昭。
The official historian commented: When it comes to things that have already happened, they are easily heard and made known due to their great achievements; when it comes to the foresight of things that have yet to happen, things are obscure so it is difficult to illuminate them clearly.