Milton's subject in his first English poem is -- we can guess it it's his future literary career.

弥尔顿在他的第一首英语诗歌里的主题，我们可以猜一下,是他将来的文学事业。

耶鲁公开课 - 弥尔顿课程节选

Very frequently, as is the case in Gadamer, this meaning is called "the subject matter": that is to say, what--in thinking about literature in terms of form and content, let's say--we'd call "content."

高达美，又把这一含义称为主题：,当我们研究文学的,形式和内容方面时，主题即内容“

耶鲁公开课 - 文学理论导论课程节选