He that loveth his brother, abideth in the light, and there is no scandal in him.

“"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: "He that loveth his brother abideth in the light; and there is none occasion of stumbling in him."”

“"He that loveth his brother abideth in the light, and there is none occasion of stumbling in him." Who are they that take scandal or make scandal? They that are offended in Christ, and in the Church. They that are offended in Christ, are as if burnt by the sun, those in the Church as by the moon. But the Psalm saith, "The sun shall not burn thee by day, neither the moon by night:" that is, if thou hold fast charity, neither in Christ shall thou have occasion of falling, nor in the Church; neither Christ shall thou forsake, nor the Church. For he that forsakes the Church, how is he in Christ who is not in the members of Christ? How is he in Christ who is not in the body of Christ? Those therefore take scandal, or, occasion of failing, who forsake Christ or the Church. Whence do we understand that the Psalm in saying, "By day shall the sun not burn thee, nor the moon by night," saith it of this, that the burning means scandal, or occasion of stumbling? In the first place mark the similitude itself. Just as the person whom something is burning saith, I cannot bear it, I cannot away with it, and draws back; so those persons who cannot bear some things in the Church, and withdraw themselves either from the name of Christ or from the Church, are taking scandal. For see how those took scandal as from the sun, those carnal ones to whom Christ preached of His flesh, saying, "He that eateth not the flesh of the Son of Man and drinketh His blood, shall have no life in him." Some seventy persons said, "This is an hard saying," and went back from Him, and there remained the twelve. All those the sun burnt, and they went back, not being able to bear the force of the Word. There remained therefore the twelve. And lest haply men should imagine that they confer a benefit upon Christ by believing on Christ, and not that the benefit is conferred by Him upon them; when the twelve were left, the Lord said to them, "Will ye also go?" That ye may know that I am necessary to you, not ye to me. But those whom the sun had not burnt, answered by the voice of Peter: "Lord, Thou hast the word of eternal life; whither shall we go?" But who are they that the Church as the moon burneth by night? They that have made schisms. Hear the very word used in the apostle: "Who is offended, and I burn not?" In what sense then is it, that there is no scandal or occasion of stumbling in him that loveth his brother? Because he that loveth his brother, beareth all things for unity's sake; because it is in the unity of charity that brotherly love exists. Some one, I know not who, offendeth thee: whether it be a bad man, or as thou supposest a bad man, or as thou pretendest a bad man: and dost thou desert so many good men? What sort of brotherly love is that which hath appeared in these persons? While they accuse the Africans, they have deserted the whole world! What, were there no saints in the whole world? Or was it possible they should be condemned by you unheard? But oh! if ye loved your brethren, there would be none occasion of stumbling in you. Hear thou the Psalm, what it saith: "Great peace have they that love Thy law, and there is to them none occasion of stumbling." Great peace it saith there is for them that love the law of God, and that is why there is to them none occasion of stumbling. Those then who take scandal, or, occasion of stumbling, destroy peace. And of whom saith he that they take not and make not occasion of stumbling? They that love God's law. Consequently they are in charity. But some man will say, "He said it of them that love God's law, not of the brethren." Hear thou what the Lord saith: "A new commandment give I unto you that ye love one another." What is the Law but commandment? Moreover, how is it they do not take occasion of stumbling, but because they forbear one another? As Paul saith, "Forbearing one another in love, studying to keep the unity of the Spirit in the bond of peace." And to show that this is the law of Christ, hear the same apostle commending this very law. "Bear ye one another's burdens," saith he, "and so shall ye fulfill the law of Christ."”

“He that loveth his brother,.... As such, and because he is his brother in Christ, and that cordially and sincerely, without hypocrisy and dissimulation, and by love serves him, both in things temporal and spiritual, and so observes the new, and yet old commandment, abideth in the light: it is a plain case, that such a man is in the light of grace, and continues in it; for though it is not his love to the brethren which is the cause of his light, of his being and continuing in it, for that is owing to the spirit of light and knowledge, but on the contrary, light is the cause of his love; yet it is an evidence of it, that by which it is known, as the cause is known by the effect; see Joh 3:14; and there is none occasion of stumbling in him, or "there is no scandal" or "offence in him"; he gives no offence to his brother, or at least, as much as in him lies, he takes care that he gives none; he avoids, as much as can be, putting a stumblingblock, or an occasion to fall, in his brother's way, by the use of things indifferent, or by any other action; nor will he easily take offence at what is said or done unto him, for charity or love is not easily provoked, it suffers long, and bears all things; see Co1 13:4; nor does he so much and so frequently transgress the laws of God, and particularly those which regard his neighbour or his brother, and so easily fall into the snares of Satan, because he is in the light, and walks in the light, and sees his way, and what lies in his way, and, so shuns and avoids occasion of stumbling and falling. There is not in him that wrath, and malice, and envy, which lead on to the commission of other sins; for love works no ill, but fulfils the law, and will not suffer him to commit adultery, to kill, to steal, or bear false witness against his neighbour, friend, and brother; see Rom 13:9; and such an one enjoys great peace, tranquillity, and happiness; he has much comfort in himself, and pleasure in the saints, and delight in their company; he walks inoffensively, and in an harmless manner, without hurting himself, or any other, Psa 119:165.”

“He that loveth his brother - That is, his neighbor, his fellow creature, whether Jew or Gentile, so as to bear him continual good will, and to be ready to do him every kind office; abideth in the light - not only gives proof that he has received Christ Jesus the Lord, but that he walks in him, that he retains the grace of his justification, and grows therein. And there is none occasion of stumbling in him - Και σκανδαλον εν αυτῳ ουκ εστιν· And there is no stumbling block in him; he neither gives nor receives offense: love prevents him from giving any to his neighbor; and love prevents him from receiving any from his neighbor, because it leads him to put the best construction on every thing. Besides, as he walks in the light, he sees the stumbling blocks that are in the way, and avoids them; every part of his path being illuminated. Many fall into sin because they do not see the snares that are in the way; and they do not see the snares because they either have not received, or do not abide in, the light.”

“Abiding in love is abiding in the light; for the Gospel light not only illumines the understanding, but warms the heart into love. none occasion of stumbling--In contrast to, "He that hateth his brother is in darkness, and walketh in darkness, and knoweth not whither he goeth, because that darkness hath blinded his eyes." "In him who loves there is neither blindness nor occasion of stumbling [to himself]: in him who does not love, there is both blindness and occasion of stumbling. He who hates his brother, is both a stumbling-block to himself, and stumbles against himself and everything within and without; he who loves has an unimpeded path" [BENGEL]. John has in mind Jesus' words, Joh 11:9-10. ALFORD well says, "The light and the darkness are within ourselves; admitted into us by the eye, whose singleness fills the whole body with light."”