“可欲之谓善”要么是一个价值命题 ,要么是一个事实命题 ,不能同时兼是。传统伦理思想不能区分出事实与价值、“是”与“应当”的本质不同。文章深入反思并揭明了中西传统伦理学在这方面的理论缺陷。 “Desire to be good” is either a value proposition or a factual proposition that can not be both at the same time. Traditional ethics can not differentiate between facts and values. The essence of “yes” and “should” is different. The article in-depth reflection and revealed the theoretical defects of traditional Chinese and Western ethics in this regard.