What is the central message of the poem "Peter Street" by Peter Sirr?

The central message of the poem is that while people die, their memories never do, and it's up to the survivors to decide what to do with those memories. When the narrator passes the site where his father once looked down from his hospital bed, the narrator feels loss when he sees a construction site where the hospital once stood. At first, the narrator wishes for some trace of his father, the father he was loathe to leave and who he stared up at in the window of the hospital. However, in the end, the narrator hopes that the site where the hospital once stood will be turned into a joyful house that will take away the traces of pain that remain from the father's suffering soul. The narrator holds the memory of his father when he walks by the site of the old hospital, but he wishes that the new construction will turn his memory from something sorrowful to something joyful.