Augustine of Hippo : Therefore the Holy Spirit, whatever it is, is something common both to the Father and Son. But that communion itself is consubstantial and co-eternal; and if it may fitly be called friendship, let it be so called; but it is more aptly called love. And this is also a substance, since God is a substance, and "God is love," as it is written. ... And therefore they are not more than three: One who loves Him who is from Himself, and One who loves Him from whom He is, and Love itself. And if this last is nothing, how is "God love"? If it is not substance, how is God substance? — ON THE TRINITY 6.5.7 Augustine of Hippo : But when we came to treat of love, which in the Holy Scriptures is called God, then a trinity began to dawn upon us a little, i.e. one that loves, and that which is loved, and love. — ON THE TRINITY 15.10 Augustine of Hippo : "And we have known and believed the love which God hath in us." And again, by what hast thou come to know this? "Love is God." He hath already said it above, behold he saith it again. Love could not be more exceedingly commended to thee than that it should be called God. Haply thou wast ready to despise a gift of God. And dost thou despise God? "Love is God: and he that dwelleth in love dwelleth in God, and God dwelleth in him." Each mutually inhabiteth the other; He that holdeth, and he that is holden. Thou dwellest in God, but that thou mayest be holden: God inhabiteth thee, but that He may hold thee, lest thou fall. Lest haply thou imagine that thou becomest an house of God in such sort as thine house supports thy flesh: if the house in which thou art withdraw itself from under thee, thou fallest; but if thou withdraw thyself, God falleth not. When thou forsakest Him, He is none the less; when thou hast returned unto Him, He is none the greater. Thou art healed, on Him thou wilt bestow nothing; thou art made clean, thou art new-made, thou art set right: He is a medicine to the unhealthy, is a rule for the crooked, is light for the bedarkened, is an habitation for the deserted. All therefore is conferred on thee: see thou imagine not that ought is conferred upon God by thy coming unto Him: no, not so much as a slave. — Ten Homilies on 1 John 8 Basil of Caesarea : If God is love, as John says, then it must be that the devil is hatred. As he who has love has God, so he who has hatred has the devil dwelling in him. — ASCETICAL DISCOURSES 2 Bede : And we have known and believed the love that God has in us. We have known that Jesus is the Son of God, and that the Father sent him as the Savior of the world. And we believe the love that God has in us, because evidently when He had His only Son, He did not want Him to be alone, but so that He might have brothers, He adopted those who would possess eternal life with Him. — Commentary on the Catholic Epistles Bede : God is love. He already said that above, behold he says it again. Love could not be commended to you more than by saying God. Perhaps you were going to scorn the gift of God: will you scorn God as well? — Commentary on the Catholic Epistles Bede : And he who abides in love, abides in God, and God in him. Conversely, those who contain and those who are contained live in each other. You dwell in God, but so that you may be contained; God dwells in you, but so that He may contain you lest you fall, because as the Apostle says of love itself: Charity never fails. How does he fall whom God contains? — Commentary on the Catholic Epistles Clement of Alexandria : It is not, then, without reason that we commanded boys to kiss their relations, holding them by the ears; indicating this, that the feeling of love is engendered by hearing. And "God," who is known to those who love, "is love," as "God," who by instruction is communicated to the faithful, "is faithful;" and we must be allied to Him by divine love: so that by like we may see like, hearing the word of truth guilelessly and purely, as children who obey us. — The Stromata Book 5 Clement of Alexandria : He does not express the divine essence, but wishing to declare the majesty of God, he has applied to the Divinity what is best and most excellent in the view of men. Thus also Paul, when he speaks of "light inaccessible." [1 Timothy 6:16] But John himself also in this same Epistle says, "God is love:" [1 John 4:16] pointing out the excellences of God, that He is kind and merciful; and because He is light, makes men righteous, according to the advancement of the soul, through charity. God, then, who is ineffable in respect of His substance, is light. — From the Latin Translation of Cassiodorus Cyprian : The word of the blessed Apostle John is: "God "saith he, "is love; and he that dwelleth in love dwelleth in God, and God dwelleth in him.". Also in the Epistle of John: "God is love l and he that dwelleth in love dwelleth in God, and God in him." — Treatise XII Three Books of Testimonies Against the Jews Cyprian : Those who have refused to be of one mind in the church of God cannot abide with God. — Treatise I. On the Unity of the Church 14 Ishodad of Merv : There is no Scripture which calls God only love, but John says this in order that we might seek him who is love, from whom the commandment to show mercy came. — COMMENTARIES