Interesting question. Angels are a favorite poetry subject, from guardian angels to fallen angels to angels appearing to shepherds to less direct references and imagined angels. I usually research pretty meticulously for both poetry and fiction–I want to get facts straight, I learn something every time, I don’t have to cite sources because I don’t quote unless it’s public domain and–research is fun!
Stories featuring Bible figures is more problematic but as long as any theology is orthodox and it’s reverent, I don’t worry too much. We don’t know everything Jesus’ disciples thought or said, for example. And you can always make up a character or use a non-specified character, like one of Abraham’s followers or one of the Greeks on Mars Hill.
Hope this helps, just a little.
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