According to the Christian tradition, angels and humans are capable of knowing and loving God. Angels do this more excellently than humans, but both do it. In the Christian tradition, angels are present not only at miraculous times, they are all around us impacting many aspects of our lives. Saint Bonaventure, a Franciscan friar from the Middle Ages, took it for granted that angels are “circling around us like flies.” Angels, to be certain, give us this lasting comfort: We are never alone.

— from For Love of Animals: Christian Ethics, Consistent Action