We have no other choice but to go forward and to keep our minds on acting firmly on the knowledge we already have;

VOA: standard.2010.05.17

But much of the exchange with Thrasymachus turns on the problem of what kind of knowledge justice involves, and justice is a kind of knowledge.

而与，Thrasymachus，交锋,所激发出的问题是,何种知识是正义所包含，及正义是一种知识。

耶鲁公开课 - 政治哲学导论课程节选