Yeats counterposes Isaiah's prophetic coal to the blazing body of Section IV, where fire is spontaneous, imminent, something that arises from the body.

叶芝将比赛亚的预言性的煤,和第五节里燃烧的身体相对照，这里火是自燃的，迫在眉睫的，是从人身体里升出的。

耶鲁公开课 - 现代诗歌课程节选

The Soul. Isaiah's coal, what more can man desire?

灵魂：你看这比赛亚的煤，人们还能期望什么东西？

耶鲁公开课 - 现代诗歌课程节选