But of beauty, I repeat again that we saw her there shining in company with the celestial forms; and coming to earth, we find her here, too, shining in clearness through the clearest aperture of sense.
~ by Plato
As humans we respond to symbols. We express divine Beauty and insight in our art. If there is a preponderance of art depicting angels with wings, obviously this symbolizes something real within the collective consciousness. Angels appear to humans according to human capacity to accept and understand the appearance. The angels inspire, and that is what is left in our heart after an angel experience.