So in this context, the river of oblivion serves an obvious purpose in the context we have here in Book Two.

故在这部分文本中，遗忘之河便是为了遗忘而存在的,在第二册书正是这样体现的。

耶鲁公开课 - 弥尔顿课程节选

Is he sincere in saying this, in making this point or his he somehow being ironical in his use of the religious tone ? or the religious register?

他说那些话时，是否诚恳地反应其论点,或他只是故做讽刺,才使用那些宗教论调,或是宗教语言？

耶鲁公开课 - 政治哲学导论课程节选