As with the passage on the falling of the leaves there's a kind of elegiac tone that works to undo, or at least to challenge, our theological certainty.

在描写落叶的段落里,有一种挽歌式的腔调，似乎要抹掉，至少是挑战神学上的确定性。

耶鲁公开课 - 弥尔顿课程节选

This is a great pattern that you can use to express a level of certainty,

这是一个很棒的句型，你可以用它来表示某种程度的肯定，

I'm sure 课堂 - SpeakingMax英语口语达人