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.
The human heart is a capacity for God. Prayer, then, is the development of the art of communion. We are called to develop the disciplines required for loving and open communion with God, the world, others, and ourselves. We need to recover the art of communion and so recover the universe as God's, and rediscover our roots in God, in the world, in one another, and in our inner selves.