The act of writing something like this can be a way of helping yourself do it. I'm not sure that's his intent, or not, but I like the idea of writing at an intermediate stage. Should he wait until his behavior is perfect before sharing his experience? If so it might never get written. There is a generosity in talking about your own flaws, it can help people who are working through their own flaws as well.

Paul Graham is among those who have written about how putting thoughts into words tends to change those thoughts: "You can know a great deal about something without writing about it. Can you ever know so much that you wouldn't learn more from trying to explain what you know? I don't think so." https://paulgraham.com/words.html

> I'm not sure that's his intent, or not

I'll just say at the very least there's no evidence in the text itself this is his intent. In fact, he blows right past his observations about himself to underline how magical letting other people be kind is, so it doesn't appear to me that he's ruminating on himself.