That "Spiritus Mundi" that Yeats refers to in "The Second Coming," well, this is Yeats talking about that idea here.

叶芝二次圣临里的宇宙之魂“,叶芝这里在谈这一观点。

耶鲁公开课 - 现代诗歌课程节选

Over whom Did the Caesars triumph?

伟人凯撒,雄狮百万,诀死之魂,何人祭奠

耶鲁公开课 - 1871年后的法国课程节选