From everything I could find it was Carl himself, But if you heard the poem online somewhere it could've been anywhere. Where did you hear it?
As well as being useful, our possessions represent our extended selves. They provide a sense of past and tell us “who we are, where we have come from and perhaps where we are going”, says Russell Belk, who studies consumerism at York University in Toronto, Canada
Basically the subject is what it’s about, like say you were reading about art the subject of the passage is art
