In this poem, the narrator is remembering, and showing his sadness on the fact that everyone grows up and begins to gain the ability to become something else, he isn't exactly showing regret than he is showing remorse that its just a way of life. But like the raven in edgar allen poes short story, remembering hurts. but in this poem, its only to a certain degree. Hope this helps. Brainliest? PLEASE?!?! ;)