Irenaeus

Just as if any one, being an apostate, and seizing in a hostile manner another man's territory, should harass the inhabitants of it, in order that he might claim for himself the glory of a king among those ignorant of his apostasy and robbery; so likewise also the devil, being one among those angels who are placed over the spirit of the air, as the Apostle Paul has declared in his Epistle to the Ephesians, becoming envious of man, was rendered an apostate from the divine law: for envy is a thing foreign to God. And as his apostasy was exposed by man, and man became the [means of] searching out his thoughts (et examinatio sententiae ejus, homo factus est), he has set himself to this with greater and greater determination, in opposition to man, envying his life, and wishing to involve him in his own apostate power. The Word of God, however, the Maker of all things, conquering him by means of human nature, and showing him to be an apostate, has, on the contrary, put him under the power of man. For He says, "Behold, I confer upon you the power of treading upon serpents and scorpions, and upon all the power of the enemy," in order that, as he obtained dominion over man by apostasy, so again his apostasy might be deprived of power by means of man turning back again to God.