Concerning the Nature of Good, Against the Manichæans 33
33 That Evil Angels Have Been Made Evil, Not by God, But by Sinning PL 42, 561
But because evil angels also were not constituted evil by God, but were made evil by sinning, Peter in his epistle says: "For if God spared not angels when they sinned, but casting them down into the dungeons of smoky hell, He delivered them to be reserved for punishment in judgment." Hence Peter shows that there is still due to them the penalty of the last judgment, concerning which the Lord says: "Go ye into everlasting fire, which has been prepared for the Devil and his angels." Although they have already penally received this hell, that is, an inferior smoky air as a prison, which nevertheless since it is also called heaven, is not that heaven in which there are stars, but this lower heaven by the smoke of which the clouds are conglobulated, and where the birds fly; for both a cloudy heaven is spoken of, and flying things are called heavenly. As when the Apostle Paul calls those evil angels, against whom as enemies by living piously we contend, "spiritual things of wickedness in heavenly places." That this may not be understood of the upper heavens, he plainly says elsewhere: "According to the presence of the prince of this air, who now worketh in the sons of disobedience."
Angelos malos non a Deo, sed peccando factos esse malos. Quia vero et ipsi mali angeli non a Deo mali sunt conditi, sed peccando facti sunt mali, sic Petrus in Epistola sua dicit: Si enim Deus angelis peccantibus non pepercit, sed carceribus caliginis inferi detrudens tradidit in judicio puniendos servari . Hinc Petrus ostendit adhuc eis ultimi judicii poenam deberi, de qua Dominus dicit: Ite in ignem aeternum, qui paratus est diabolo et angelis ejus. Quamvis jam poenaliter hunc inferum, hoc est, inferiorem caliginosum aerem tanquam carcerem acceperint: qui tamen quoniam et coelum dicitur, non illud coelum in quo sunt sidera, sed hoc inferius cujus caligine nubila conglobantur, et ubi aves volitant; nam et coelum nubilum dicitur, et volatilia coeli appellantur: secundum hoc Apostolus Paulus eosdem iniquos angelos, contra quos nobis invidos pie vivendo pugnamus, spiritualia nequitiae in coelestibus nominat . Quod ne de illis superioribus coelis intelligatur, aperte alibi dicit: Secundum principem potestatis aeris hujus, qui nunc operatur in filiis diffidentiae .