The poem seems a bit rough. The second half flows well with a good ending sentiment, but the first half keeps hitting me like a brick wall. There's a very obvious rhyming scheme that goes on, but it abruptly stops at some points without giving me the impression that you meant to draw attention to those lines. It's a great sentiment, but it feels like a first draft. I've been thinking on it for a few days, but I'm not sure where to go with the first half. I guess the idea that someone would equate flying with an angel to being killed throws me for a loss. I could understand references to awe and fear, but pain is a stretch for me. Poetry has never been my forte, so the best I can do is mention what seems wrong to me. I can't easily suggest what might improve it. I hope this helps.