Sonnet Analysis: Part 1

I believe that the sonnet "Those Winter Sundays" by Robert Hayden is a metaphor about the things parents do out of the love for their children, and yet their children are unappreciative of it. How parents continually do what they deem is best for their children, and yet all they get are complaints and/or no appreciation for it. Above all else, it concerns how fathers do their duty no matter what even though they receive no thanks in return. And how, when you look back as a child, you realize just how ungrateful you are. However, rather than simply wallow in self-guilt, it ends with "What did I know..?" signaling that had the author known ahead of time all the things his father did for him, he would have been more appreciative and shown his thanks.