John_ChrysostomOn Romans 13:11-14.

“Let us therefore cast off the works of darkness, and let us put on the armor of light.”

Yes, for the day is calling us to battle-array, and to the fight. Yet fear not at hearing of array and arms…. For it is of Light the arms are!

Hence they will set thee forth brighter than the sunbeam, and giving out a great glistening, and they place thee in security,

For they are arms, and glittering do they make thee; for arms of light are they!

What then, is there no necessity for thee to fight? Yea, needful is it to fight, yet not to be distressed and toil.

For it is not in fact war, but a solemn dance and feast-day, such is the nature of the arms, such the power of the Commander.

And as the bridegroom goes forth with joyous looks from his chamber, so doth he too who is defended with these arms. For he is at once soldier and bridegroom.

But when he says, “the day is at hand,” he does not even allow it to be but near, but puts it even now beside us. For he says, “But put ye on the Lord Jesus Christ.

[…] In saying, “Put ye on,” he bids us be girt about with Him upon every side. As in another place he says, “But if Christ be in you” (Rom. 8:10). And again, “That Christ may dwell in the inner man” Eph. 3:16-17).

For He would have our soul to be a dwelling for Himself, and Himself to be laid round about us as a garment, that He may be unto us all things both from within and from without.

For He is our fulness; for He is “the fulness of Him that filleth all in all” (Eph. 1:23): and the Way, and the Husband, and the Bridegroom: for “I have espoused you as a chaste virgin to one husband” (2 Cor. 11:2);

and a root, and drink, and meat, and life:for he says, “I live, yet not I, but Christ liveth in me” (Gal. 2:20);

and Apostle, and High-Priest, and Teacher, and Father, and Brother, and Joint-heir, and sharer of the tomb and Cross: for it says, “We were buried together with Him,” and “planted together in the likeness of His Death” (Rom. 6:4-5);

and a Suppliant: “For we are ambassadors in Christ’s stead” (2 Cor. 5:20); and an “Advocate to the Father” : for “He also maketh,” it says, “intercession for u:” (Rom. 8:34);

and house and inhabitant: for He says, “He that abideth in Me and I in Him” (John 15:5); and a Friend: for, “Ye are My friends” (John 15:14).

John Chrysostom (c.347-407): Homilies on the Epistle to the Romans @ Lectionary Central.