"I think that poetry, in general, after a certain point in a poet's life, has to do with the acknowledgment of mortality. And even the most joyful poems have to do with, "Yes, let's not forget that life is brief." Once I started dealing with grief in poetry, I discovered that I had found my way to poetry. I think that so many young poets are only writing about the joy of love and that sort of thing and don't understand that the great poetry, like Dylan Thomas's "Do Not Go Gentle" and like Wordsworth's "Intimations" and "Tintern Abby," has all been a moment when the poet realizes that "this is my time to express what I have gathered in this brief life.""
January 1, 1970
https://en.wikiquote.org/wiki/William_Wordsworth