It's a kind of dare demonstrating not just his indifference to the crowd but in fact his scorn for it.

叶芝这种胆量,不仅说明他对大众的漠然,其实还是对它的蔑视。

耶鲁公开课 - 现代诗歌课程节选

And yet,for all that,feels removed,distant, alienated from the others,feels lonely even in the crowd.

但还是感觉非常疏远，有距离感，感到和他人疏远，在人群中都觉得孤单。

耶鲁公开课 - 死亡课程节选