1 John 2:9

Ver. 9 . “He that saith he is in the light,”, in the light, he means in the truth, “and hateth,” he says, “his brother.” By his brother, he means not only his neighbour, but also the Lord. For unbelievers hate Him and do not keep His commandments. Therefore also he infers:

11. Why do you rush into the darkness of jealousy? why do you enfold yourself in the cloud of malice? why do you quench all the light of peace and charity in the blindness of envy? why do you return to the devil, whom you had renounced? why do you stand like Cain? For that he who is jealous of his brother, and has him in hatred, is bound by the guilt of homicide, the Apostle John declares in his epistle, saying, “Whosoever hateth his brother is a murderer; and ye know that no murderer hath life abiding in him.” And again: “He that saith he is in the light, and hateth his brother, is in darkness even until now, and walketh in darkness, and knoweth not whither he goeth, because that darkness hath blinded his eyes.” Whosoever hates, says he, his brother, walketh in darkness, and knoweth not whither he goeth. …

In Malachi: “Hath not one God created us? Is there not one Father of us all? Why have ye certainly deserted every one his brother?” Of this same thing according to John: “Peace I leave with you, my peace I give unto you.” Also in the same place: “This is my commandment, That ye love one another, even as I have loved you. Greater love than this has no man, than that one should lay down his life for his friends.” Also in the same place: “Blessed are the peacemakers, for they shall be called the sons of God.” Also in the same place: “Verily I say unto you, That if two of you shall agree on earth concerning everything, whatever you shall ask it shall be given you from my Father which is in heaven. …

“And the light shineth in darkness and the darkness hath not overtaken it.” We are still enquiring about the light of men, since it is what was spoken of in the preceding verse, and also, I consider, about darkness, which is named as its adversary, the darkness also being, if the definition of it is correct, that of men. The light of men is a generic notion covering two special things; and with the darkness of men it is the same. He who has gained the light of men and shares its beams will do the work of light and know in the higher sense, being illuminated by the light of the higher knowledge. And we must recognize the analogous case of those on the other side, and of their evil actions, and of that which is thought to be but is not really knowledge, since those who exercise it have the reason (Logos) not of light but of darkness. …

Chapter 13. 20. There is therefore "no fellowship between righteousness and unrighteousness," not only without, but also within the Church; for "the Lord knoweth them that are His," and "Let every one that nameth the name of Christ depart from iniquity." There is also "no communion between light and darkness," not only without, but also within the Church; for "he that hateth his brother is still in darkness." And they at any rate hated Paul, who, preaching Christ of envy and malicious strife, supposed that they added affliction to his bonds; and yet the same Cyprian understands these still to have been within the Church. …

27. He makes an assumption, then, not "of mere custom," but "of the reason of truth itself," when he says that the sacrament of God cannot be turned to error by the error of any men, since it is declared to exist even in those who have erred. Assuredly the Apostle John says most plainly, "He that hateth his brother is in darkness even until now;" and again, "Whosoever hateth his brother is a murderer;" and why, therefore, do they baptize those within the Church whom Cyprian himself declares to be in the envy of malice?

Chapter 21. 29. But as to what he says, that "he who comes to the Church is to be baptized and renewed, that within he may be hallowed through the holy," what will he do, if within also he meets with those who are not holy? Or can it be that the murderer is holy? And if the reason for his being baptized in the Church is that "he should put off this very thing also that he, being a man that sought to come to God, fell, through the deceit of error, on one profane," where is he afterwards to put off this, that he may chance, while seeking a man of God within the Church itself, to have fallen, through the deceit of error, on a murderer? If "there cannot be in a man something that is void and something that is valid," why is it possible that in a murderer the sacrament should be holy and his heart unholy? If "whosoever cannot give the Holy Spirit cannot baptize," why does the murderer baptize …

23. Lucius of Castra Galbæ has brought forward a proof from the gospel, in the words of the Lord, "Ye are the salt of the earth: but if the salt have lost his savor, that which is salted from it shall be good for nothing, but to be cast out, and to be trodden under foot of men;" just as though we maintained that men when cast out were of any profit for the salvation either of themselves or of any one else. But those also who, though seeming to be within, are yet of such a kind, not only are without spiritually, but will in the end be separated in the body also. For all such are for nothing. But it does not therefore follow that the sacrament of baptism which is in them is nothing. For even in the very men who are cast out, if they return to their senses and come back, the salvation which had departed from them returns; but the baptism does not return, because it never had departed. …

3. In order then that we may be able well to do and to fulfil what we have been admonished of to-day, let us first persuade ourselves to this, above all things to have no hate. For when there is no beam in thine own eye, thou seest rightly whatever may be in thy brother’s eye; and art uneasy, till thou cast out of thy brother’s eye what thou seest to hurt it. The light that is in thee, doth not allow thee to neglect thy brother’s light. Whereas if thou hate, and wouldest correct him, how dost thou improve his light, when thou hast lost thine own light? For the same Scripture, where it is written, “Whosoever hateth his brother is a murderer,” hath expressly told us this also. “He that hateth his brother is in darkness even until now.” Hatred then is darkness. Now it cannot but be, that he who hateth another, should first injure himself. …

11. “He that saith he is in the light”, now he is making all clear that he has been saying, “he that saith he is in the light, and hateth his brother, is in darkness even until now.” What! my brethren, how long shall we say to you, “Love your enemies”? See whether, what is worse, ye do not hate your brethren. If ye loved only your brethren, ye would be not yet perfect: but if ye hate your brethren, what are ye, where are ye? Let each look to his own heart: let him not keep hatred against his brother for any hard word; on account of earthly contention let him not become earth. For whoso hates his brother, let him not say that he walks in the light. …

7. “Fearfulness and trembling have come upon me, and darkness hath covered me” ( ver. 5 ). “And I have said,” “He that hateth his brother, is in darkness until now.” If love is light, hatred is darkness. And what saith to himself one set in that weakness and troubled in that exercise? “Who shall give me wings as to a dove, and I shall fly and shall rest?” ( ver. 6 ). Either for death he was wishing, or for solitude he was longing. So long, he saith, as this is the work with me, as this command is given me, that I should love enemies, the revilings of these men, increasing and shadowing me, do derange mine eye, perturb my sight, penetrate my heart, slay my soul. …

For that we may not suppose that he speaks of that sort of life which all men live, when he says, “that we may lead a quiet and peaceable life,” he adds, “in all godliness and honesty,” since a quiet and peaceable life may be led by heathens, and profligates, and voluptuous and wanton persons may be found living such a life. That this cannot be meant, is plain, from what he adds, “in all godliness and honesty.” Such a life is exposed to snares, and conflicts, and the soul is daily wounded by the tumults of its own thoughts. But what sort of life he really means is plain from the sequel, and plain too, in that he speaks not simply of godliness, but adds, of “all godliness.” For in saying this he seems to insist on a godliness not only of doctrine, but such as is supported by life, for in both surely must godliness be required. …