This is Yeats in costume, costumed as a figure from Irish myth, as an ancient bard, mad King Goll, which is the furthest thing from a modern poet.

穿着奇装异服的叶芝，打扮成爱尔兰传说中的人物，过去的吟唱诗人，疯癫的郭尔王，他与这位现代诗人相隔甚远。

耶鲁公开课 - 现代诗歌课程节选

In a way, Yeats is always in costume.

从某种程度上说，叶芝常作此装扮。

耶鲁公开课 - 现代诗歌课程节选