It's an amazing passage because in a lot of ways, I think, Milton is actually directly enacting for us, the reader, the impossibility of such sweet forgetfulness.

我认为这段诗在很多方面都是令人惊叹的，弥尔顿事实上在直接为我们读者上演着，取得甜美遗忘的不可能。

耶鲁公开课 - 弥尔顿课程节选

It's a fantasy, of course, because no such brainwashing is going to be possible, just as the fallen angels - if you look at line 607 - will be barred from drinking their fill of the river Lethe, forgetfulness is impossible.

当然这是一次幻想，因为这种洗脑,根本就不可能实现，就如同那些堕落天使一般,如果看第607行7,他们被禁止喝忘川之水，遗忘是不可能的。

耶鲁公开课 - 弥尔顿课程节选