World Wide Study Bible
a Bible passage
14 We know. He commends love to us by a remarkable eulogy, because it is an evidence of a transition from death to life. It hence follows that if we love the brethren we are blessed, but that we are miserable if we hate them. There is no one who does not wish to be freed and delivered from death. Those then who by cherishing hatred willingly give themselves up to death, must be extremely stupid and senseless. But when the Apostle says, that it is known by love that we have passed into life, he does not mean that man is his own deliverer, as though he could by loving the brethren rescue himself from death, and procure life for himself; for he does not here treat of the cause of salvation, but as love is the special fruit of the Spirit, it is also a sure symbol of regeneration. Then the Apostle draws an argument from the sign, and not from the cause. For as no one sincerely loves his brethren, except he is regenerated by the Spirit of God, he hence rightly concludes that the Spirit of God, who is life, dwells in all who love the brethren. But it would be preposterous for any one to infer hence, that life is obtained by love, since love is in order of time posterior to it.
The argument would be more plausible, were it said that love makes us more certain of life: then confidence as to salvation would recumb on works. But the answer to this is obvious; for though faith is confirmed by all the graces of God as aids, yet it ceases not to have its foundation in the mercy of God only. As for instance, when we enjoy the light, we are certain that the sun shines; if the sun shines on the place in which we are, we have a clearer view of it; but yet when the visible rays do not come to us, we are satisfied that the sun diffuses its brightness for our benefit. So when faith is founded on Christ, some things may happen to assist it, still it rests on Christ’s grace alone.