1 Peter 5

For indeed if virtue be absent, it is no advantage to be an angel by nature; and the Devil is a proof of this, who was an angel once: but if virtue be present, it is no loss to be a man by nature; and John is a proof of this, who was a man, and Elias who went up into heaven, and all those who are about to depart thither. For these indeed, though with bodies, were not prevented from dwelling in heaven: while those others, though without bodies, could not remain in heaven. Let no one then grieve or be vexed with his nature as if it were a hindrance to him, but with his will. He the Devil from being incorporeal became a lion: for lo! it saith, "Our adversary, as a roaring lion, walketh about, seeking whom he may devour:" we from being corporeal, become angels.