Cum vos, dilectissimi, ad vigilandum et orandum ipsa solemnitas sanctae hujus noctis hortetur; etiam nostrum vobis tamen solemniter debetur alloquium, ut adversus contrarias et invidas potestates rectoresque tenebrarum, velut contra nocturnas bestias, dominicum gregem etiam vox pastoralis exsuscitet. Non est enim nobis colluctatio adversus carnem et sanguinem, sicut Apostolus dicit; id est, adversus homines mortali corpore infirmos: sed adversus principes et potestates, et rectores mundi tenebrarum harum, adversus spiritualia nequitiae in coelestibus (Ephes. VI, 12). Nec ideo sane diabolum et angelos ejus, quos Apostolus his verbis significat, mundi hujus existimetis esse rectores, de quo scriptum est, Et mundus p⟨er⟩ eum factus est (Joan. I, 10). Nam eos rectores ⟨m⟩undi cum etiam ipse dixisset, ne quis mun⟨d⟩um intelligeret, qui plerisque Scripturarum ⟨l⟩ocis coeli et terrae nomine nuncupatur; ⟨c⟩ontinuo tanquam exponendo addidit, tenebr⟨a⟩rum harum, hoc est, infidelium. Propter quod jam fidelibus dicit, Fuistis aliquando tenebrae, nunc autem lux in Domino (Ephes. V, 8). Sunt ergo ista spiritualia nequitiae in coelestibus; non ubi sidera disposita effulgent, et sancti Angeli commorantur; sed in hujus aeris infimi caliginoso habitaculo, ubi et nebula conglobat⟨u⟩r: et tamen scriptum est, Qui cooperit caelum nubibus (Psal. CXLVI, 8). Ubi et aves volitant: et tamen dicuntur volatilia coeli (Psal. XLIX, 11). In his ergo coelestibus, non in illa superiore tranquillitate coelestium, habitant isti nequissimi spiritus, contra quos nobis colluctatio spiritualis indicitur: ut devictis angelis malis, illo praemio perfruamur, quo Angelis bonis incorrupta aeternitate sociemur. Unde alio loco idem apostolus, cum significaret tenebrosum diaboli principatum: Secundum spiritum, inquit, mundi hujus secundum principem potestatis aeris hujus, qui nunc operatur in filiis infidelitatis (Ephes. II, 2). Quod ergo est spiritus mundi hujus, hoc sunt rectores mundi. Et sicut illic exposuit quid dixerit mundum, in filiis infidelitatis: sic etiam hic, cum addidit, tenebrarum harum. Et quod ibi ait, principem potestatis aeris; hoc isto loco, in coelestibus. Gratias itaque Domino Deo nostro, qui nos eruit de potestate tenebrarum, et transtulit in regnum Filii charitatis suae (Coloss. I, 12, 13). Ab illis ergo tenebris evangelica luce distincti, et ab illis potestatibus sanguine pretioso redempti, vigilate et orate, ne intretis in tentationem (Matth. XXVI, 41). Nam quicumque habetis fidem quae per dilectionem operatur (Galat. V, 6), missus est princeps hujus mundi foras a cordibus vestris (Joan. XII, 31): sed forinsecus tanquam leo rugiens circuit quaerens quem devoret (I Petr. V, 8). Non ergo detis locum diabolo, quacumque ex parte penetrare volenti: sed qui eum foras misit patiendo pro vobis, adversus eum habitet intus in vobis. Cum vobis ille dominaretur, fuist⟨i⟩s aliquando tenebrae; nunc autem lux in Domino: sicut filii lucis ambulate. Adversus tenebras earumque rectores in matre luce vigilate, et Patrem luminum de sinu matris lucis orate.
Since, most beloved, the very solemnity of this holy night exhorts you to keep vigil and to pray, yet an address from us is also solemnly owed to you, so that the shepherd's voice too may rouse the Lord's flock against the hostile and envious powers and the rulers of darkness, as against beasts of the night. For our wrestling is not against flesh and blood, as the Apostle says, that is, against human beings weak in a mortal body; but against the princes and powers, and the rulers of the world of this darkness, against the spiritual [forces] of wickedness in the heavenly places (Eph. 6:12). Yet do not on that account suppose that the devil and his angels, whom the Apostle signifies by these words, are rulers of this world of which it is written, And the world was made through Him (John 1:10). For when he had called them rulers of the world, lest anyone should understand the world which in very many places of the Scriptures is designated by the name of heaven and earth, he at once added, as if by way of explanation, of this darkness, that is, of the unbelieving. Wherefore he says to those who are now believers, You were once darkness, but now light in the Lord (Eph. 5:8). These spiritual [forces] of wickedness, then, are in the heavenly places; not where the stars shine in their appointed order and the holy angels dwell, but in the murky dwelling of this lowest air, where the cloud too gathers; and yet it is written, Who covers the heaven with clouds (Ps. 146:8). Where the birds too fly about; and yet they are called the winged creatures of heaven (Ps. 49:11). In these heavenly places, therefore, not in that higher tranquillity of the heavenly beings, dwell those most wicked spirits, against whom a spiritual wrestling is proclaimed for us: so that, the evil angels having been overcome, we may enjoy that reward by which we shall be made companions of the good angels in incorruptible eternity. Hence in another place the same apostle, when he would signify the dark dominion of the devil, says: According to the spirit of this world, according to the prince of the power of this air, who now works in the children of unbelief (Eph. 2:2). What therefore the spirit of this world is, that the rulers of the world are. And just as there he explained what he meant by world, in the children of unbelief, so here also, when he added, of this darkness. And what he says there, the prince of the power of the air, [he says] in this place, in the heavenly places. Thanks therefore to the Lord our God, Who has rescued us from the power of darkness and transferred us into the kingdom of the Son of His love (Col. 1:12–13). Set apart, then, from that darkness by the light of the Gospel, and redeemed from those powers by precious blood, keep vigil and pray, that you may not enter into temptation (Matt. 26:41). For whoever of you have faith which works through love (Gal. 5:6), the prince of this world has been cast out of your hearts (John 12:31); but outside, like a roaring lion, he goes about seeking whom he may devour (1 Pet. 5:8). Do not therefore give place to the devil, who wishes to break in from whatever side; but let Him Who cast him out by suffering for you dwell within you against him. When he lorded it over you, you were once darkness; but now light in the Lord: walk as children of light. Against the darkness and its rulers keep vigil in mother light, and pray to the Father of lights from the bosom of mother light.