There is a short story by the wonderful Dave Eggers that goes by the above title (or something like it, I wanted to put the story here but inevitably can't find the book) in which the narrator talks about a man he knows and finds to be somewhat intolerable.
Then, one day, he does something simply decent for someone and is told by them that he is 'a good man'. The narrator feels that, from this point on, the man's continuing conduct is elevated and improved to such an extent that he may actually have become deserving of such a compliment. The suggestion being that being called a good man inspired the bloke to try and live up to such a title.
I reflect on this today because yesterday I was told by someone whose opinion really counts for something that I am a good man. I haven't been told that in a long time, aside from in the colloquial, platitudinous sense that colleagues might use it, i.e. "Do you mind helping me out with this? Good man."
I haven't felt like a good man for quite a while; too many idiocies and idiosyncrasies have put paid to that. But hearing those words with sincerity means that I might just become one, sooner or later.