Athanasius of Alexandria

Since the evil spirits have no power, they play as on a stage, changing their shapes and frightening children by the apparition of crowds and by their changed forms. This is why they are to be despised the more for their powerlessness. The true angel sent by the Lord against the Assyrians had no need of crowds or apparitions from without, or loud noises or clappings, but he used his power quietly and destroyed 185, at one time. Powerless demons such as these, however, try to frighten, if only by empty phantoms.