內容摘要：《五行》篇中「形於內」的「德之行」與「不形於內」的「行，實際是一種雙重道德律，它與郭店簡其他篇目中的「仁內義外」說表達的是一個意思，這是理解《五行》思想的關鍵；《五行》突出「聖」、「智」之論，表現出道德實踐中的二元論傾向；《五行》前半部分主要談「形於內」的「德之行」，後半部分談「不形於內」的「行」；《五行》對以後的孟、筍均產生影響；根據《五行》的思想和特點，將其看作子思的作品可能較合適。

　　　　　Abstract: The "virtue" referred in Five Elements by the "internally-formed virtue", the "externally-practiced virtue" and the "non-internally-formed virtue" is actually a two-fold moral law. Such a virtue is exactly what Guo Dian-jian meant by "internal Ren and external Yi" in other writings and also the key to the thoughts of Five Elements. The book emphasizes the doctrines about "holiness" and "wisdom," showing the dualist inclination of moral practice; the first half k is about "internally-formed virtue" and the "externally-practiced virtue," while the second half is about "non-internally-formed virtue." Five Elements had great influence on the later scholars like Mencius and Xun-Zi; regarding its thoughts and characteristics, it's more appropriate to ascribe the work to Zi-Si.