Philip Larkin-High Windows

The reason this poem caught my eye is quite simple.  It dropped the f-bomb in the first sentence.  What I gathered from this poem after reading it a couple of times is that it is a bitter old man who is getting to the end of his life.  He is watching younger people and "admiring" their adtions.  He was wondering if people "admired" him forty five years ago the way he is now.  That was what I first thought anyways.  I think now that he isnt so bitter, but just notices things that oldeer people generally do, but dont speak aloud.  He thinks of high windows which probably not alot of people pay attention to and he sees an endless blue.  Kind of just makes me think he has a lot of stuff on his mind, but he just stares into the endless with out speaking.