11 Beloved Now the Almighty accommodates to his own purpose what he has just taught us respecting the love of God; for he exhorts us by God’s example to brotherly love; as also Paul sets before us Christ, who offered himself to the Father a sacrifice of pleasant fragrance, that every one of us might labor to benefit his neighbors. (Ephesians 5:2.) And John reminds us, that our love ought not to be mercenary, when he bids us to love our neighbors as God has loved us; for we ought to remember this, that we have been loved freely. And doubtless when we regard our own advantage, or return good offices to friends, it is self-love, and not love to others.

12 No man hath seen God The same words are found in the first chapter of John’s Gospel; but John the Baptist had not there exactly the same thing in view, for he meant only that God could not be otherwise known, but as he has revealed himself in Christ. The Apostle here extends the same truth farther, that the power of God is comprehended by us by faith and love, so as to know that we are his children and that he dwells in us.

He speaks, however, first of love, when he says, that God dwells in us, if we love one another; for perfected, or really proved to be, in us is then his love; as though he had said, that God shews himself as present, when by his Spirit he forms our hearts so that they entertain brotherly love. For the same purpose he repeats what he had already said, that we know by the Spirit whom he has given us that he dwells in us; for it is a confirmation of the former sentence, because love is the effect or fruit of the Spirit.

The sum, then, of what is said is, that since love is from the Spirit of God, we cannot truly and with a sincere heart love the brethren, except the Spirit puts forth his power. In this way he testifies that he dwells in us. But God by his Spirit dwells in us; then, by love we prove that we have God abiding in us. On the other hand, whosoever boasts that he has God and loves not the brethren, his falsehood is proved by this one thing, because he separates God from himself.

When he says, and his love is perfected, the conjunction is to be taken as a causative, for, or, because And love here may be explained in two ways, either that which God shews to us, or that which he implants in us. That God has given his Spirit to us, or given us of his Spirit, means the same thing; for we know that the Spirit in a measure is given to each individual.

14 And we have seen He now explains the other part of the knowledge of God, which we have referred to, that he communicates himself to us in his Son, and offers himself to be enjoyed in him. It hence follows, that he is by faith received by us. For the design of the Apostle is to shew, that God is so united to us by faith and love, that he really dwells in us and renders himself in a manner visible by the effect of his power, who otherwise could not be seen by us.

When the Apostle says, We have, seen and do testify, he refers to himself and others. And by seeing, he does not mean any sort of seeing, but what belongs to faith by which they recognized the glory of God in Christ, according to what follows, that he was sent to be the Savior of the world; and this knowledge flows from the illumination of the Spirit.

15 Whosoever shall confess He repeats the truth, that we are united to God by Christ, and that we cannot be connected with Christ except, God abides in us. Faith and confession are used indiscriminately in the same sense; for though hypocrites may wisely boast of faith, yet the apostle here acknowledges none of those who ordinarily confess, but such as truly and from the heart believe. Besides, when he says that Jesus is the Son of God, he briefly includes the sum and substance of faith; for there is nothing necessary for salvation which faith finds not in Christ

After having said in general, that men are so united to Christ by faith, that Christ unites them to God, he subjoined what they themselves had seen so that he accommodated a general truth to those to whom he was writing. Then follows the exhortation, to love one another as they were loved by God. Therefore the order and connection of his discourse is this, — Faith in Christ, makes God to dwell in men, and we are partakers of this grace; but as God is love, no one dwells in him except he loves his brethren. Then love ought to reign in us, since God unites himself to us.

16 And we have known and believed It is the same as though he had said, “We have known by believing;” for such knowledge is not attained but by faith. But we hence learn how different, is an uncertain or doubtful opinion from faith. Besides, though he meant here, as I have already said, to accommodate the last sentence to his readers, yet he defines faith in various ways. He had said before, that it is to confess that Jesus is the Son of God; but, he now says, We know by faith God’s love towards us. It hence appears, that the paternal love of God is found in Christ, and that nothing certain is known of Christ, except by those who know themselves to be the children of God by his grace. For the Father sets his own Son daily before us for this end, that he may adopt us in him.

God is love This is as it were the minor proposition in an argument; for from faith to love he reasons in this way: By faith God dwells in us, and God is love; then, wherever God abides, love ought to be there. Hence it follows that love is necessarily connected with faith.