[240] We must, therefore, think that they are full of every description of misery, which, having been brought up in the air, and in the aether which is the purest of all things, have changed their abode (not being able to bear the satiety of divine things), and have descended to that mortal and evil district, the earth. And there are innumerable imaginations concerning an innumerable variety of things which roam about upon it also; some voluntary, and some out of ignorance, which are in no respect different from winged creatures, and which Moses compares to the birds that come down.