Andreas of Caesarea : What is this message? It is that eternal life has appeared to us. For the Father so loved the world that he gave his only-begotten Son, and this is what we proclaim to you—that the Word of God who has come into the world and become a man is both God and light. — CATENA Augustine of Hippo : Truly that Light is God Himself, for "God is Light, and in Him is no darkness at all;" but He is the Light of purified minds, not of these bodily eyes. And the mind shall then be, what meanwhile it is not, able to see that light. But this the bodily eye neither now is, nor shall then be, able to see. For everything which can be seen by the bodily eye must be in some place, nor can be everywhere in its totality, but with a smaller part of itself occupies a smaller space, and with a larger part a larger space. It is not so with God, who is invisible and incorruptible, "who only hath immortality, dwelling in the light which no man can approach unto; whom no man hath seen nor can see." — LETTERS 92 Augustine of Hippo : "God is light, and there is no darkness in Him at all." Who would dare to say that there is darkness in God? Or what is the light? Or what darkness? Lest haply he speaks of such things as pertain to these eyes of ours. "God is light." Saith some man, "The sun also is light, and the moon also is light, and a candle is light." It ought to be something far greater than these, far more excellent, and far more surpassing. How much God is distant from the creature, how much the Maker from the making, how much Wisdom from that which is made by Wisdom, far beyond all things must this light needs be. And haply we shall be near to it, if we get to know what this light is, and apply ourselves unto it, that by it we may be enlightened; because in ourselves we are darkness, and only when enlightened by it can we become light, and not be put to confusion by it, being put to confusion by ourselves. Who is he that is put to confusion by himself? He that knows himself to be a sinner. Who is he that by it is not put to confusion? He who by it is enlightened. What is it to be enlightened by it? He that now sees himself to be darkened by sins, and desires to be enlightened by it, draws near to it: whence the Psalm saith, "Draw near unto Him, and be ye enlightened; and your faces shall not be ashamed." But thou shalt not be shamed by it, if, when it shall show thee to thyself that thou art foul, thine own foulness shall displease thee, that thou mayest perceive its beauty. This it is that He would teach. — Ten Homilies on 1 John 1 Bede : And this is the message which we have heard from him, etc. By this statement, blessed John both shows the excellence of divine purity, which we are also commanded to imitate, saying: Be holy, for I, the Lord your God, am holy (Leviticus XIX); and he refutes the insane doctrine of the Manicheans, who said that the nature of God was conquered and corrupted by the prince of darkness in war. — Commentary on the Catholic Epistles Clement of Alexandria ((as quoted by Cassiodorus)) : "For God," he says, "is light." 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. "And in Him is no darkness at all," - that is, no passion, no keeping up of evil respecting any one, [He] destroys no one, but gives salvation to all. Light moreover signifies, either the precepts of the Law, or faith, or doctrine. Darkness is the opposite of these things. Not as if there were another way; since there is only one way according to the divine precepts. For the work of God is unity. Duality and all else that exists, except unity, arises from perversity of life. — From the Latin Translation of Cassiodorus Didymus the Blind : John wrote that the proclamation, by which it was stated that God is light, with no shadows in him at all, was made by the Savior himself to his disciples. Now he is sharing it with his readers so that they too might believe the same thing about God. — COMMENTARY ON 1 JOHN Jerome : When John says that there is no darkness in the light of God, he proves that all the lights of others are stained by some blemish. — Against the Pelagians 2.7 Oecumenius : And this is the promise that we have heard from Him; and we announce to you that God is light, and in Him there is no darkness at all. Having said this, John resumes the conversation, explaining what the announcement he heard is: and he says that this is that God is light, and in Him there is no darkness at all. And where did John hear it? From Christ Himself, who said: "I am the light of the world (Jn. 8:12);" and: "I came as light into the world." (Jn. 13:46) Light therefore is, and darkness is not in it. Spiritual light, however, stirs the eyes of our soul to its reception, turning away from all these material things, and urging solely towards its desire with loving affection. However, darkness signifies either ignorance or sin. In God, indeed, neither ignorance nor sin can be found. For these refer to material things and the structure that is found among us. If it has been said elsewhere: "Darkness has been placed as a hiding place for Him," (Ps. 17:12) it was nonetheless said "has been placed;" not, however, "he is darkness," as it was said, "God is light." For it is one thing that is placed by Him who places. Here, then, darkness signifies ignorance, which consists in the fact that God cannot be comprehended: and this is ours, not God's. Therefore, something is placed among those things that do not belong to anyone, nor for his own sake, but for someone else that concerns him. That he also calls darkness sin is evident from what has been said by the same in the Gospel. For what does John say there? "And the light shines in the darkness, and the darkness did not comprehend it (Jn. 1:5);" by calling darkness our substance, which is subject to sins, in which he was made or by which he was assumed, he did not contract impurities from it: for he did no sin, etc. — Commentary on 1 John Origen of Alexandria : God is light, according to John. The only-begotten Son therefore is the brightness of that light, proceeding from God without separation, as brightness from light, and lightening the whole creation. — ON FIRST PRINCIPLES 1.2.7 Symeon the New Theologian : Let no one deceive you. God is light, and to those who have entered into union with him, he imparts of his own brightness to the extent that they have been purified. — DISCOURSES 15.3 Tertullian : Draw whatever (veil of) darkness you please over your deeds, "God is light." But some think as if God were under a necessity of bestowing even on the unworthy, what He has engaged (to give); and they turn His liberality into slavery. — On Repentance Tertullian : Nay, but this whole world is the one house of all; in which world it is more the heathen, who is found in darkness, whom the grace of God enlightens, than the Christian, who is already in God's light. Finally, it is one "straying" which is ascribed to the ewe and the drachma: (and this is an evidence in my favour); for if the parables had been composed with a view to a Christian sinner, after the loss of his faith, a second loss and restoration of them would have been noted. — On Modesty