What are the roles of angels in the poem a song for st.cecilia’s day by John Dryden?

Though “A Song for St. Cecilia's Day, 1687” celebrates a Catholic holiday, the poem contains references to more than one belief system. Alongside the Biblical references to Jubal, Heaven, and angels, and the Catholic narrative of St. Cecilia, the speaker incorporates the Greek myth of Orpheus. Greek philosophy also makes multiple appearances: Pythagorean cosmology, Aristotelian atomic theory, and Epicurean atomic theory are all featured in this poem.