God has assured us that the labour which we undergo for the glory of his name shall not be in vain. And we should always remember that this promise, as well as all others, would be fraught with no benefit to us, unless it were preceded by the gratuitous covenant of mercy, on which the whole certainty of our salvation must depend. But relying on that covenant, we may securely confide, that our services, however unworthy, will not go without a reward from the goodness of God. To confirm us in that expectation, the apostle asserts that God is not unrighteous, but will perform the promise he has once made. This righteousness, therefore, refers rather to the truth of the Divine promise, than to the equity of rendering to us any thing that is our due. To this purpose there is a remarkable observation of Augustine; and as that holy man has not hesitated frequently to repeat it as deserving of remembrance, so I deem it not unworthy of a constant place in our minds. “The Lord,” says he, “is faithful, who has made himself our debtor, not by receiving any thing from us, but by promising all things to us.” VIII. Our Pharisees adduce the following passages of Paul: “Though I have all faith, so that I could remove mountains, and have not charity, I am nothing.” Again: “Now abideth faith, hope, charity, these three; but the greatest of these is charity.”[219] Again: “Above all these things, put on charity, which is the bond of perfectness.”[220] From the first two passages they contend that we are justified rather by charity than by faith; that is, by the superior virtue, as they express it. But this argument is easily overturned. For we have already shown, that what is mentioned in the first passage, has no reference to true faith. The second we explain to signify true faith, than which he calls charity greater, not as being more meritorious, but because it is more fruitful, more extensive, more generally serviceable, and perpetual in its duration; whereas the use of faith is only temporary. In respect of excellence, the preëminence must be given to the love of God, which is not in this place the subject of Paul’s discourse. For the only point which he urges is, that with reciprocal charity we mutually edify one another in the Lord. But let us suppose that charity excels faith in all respects, yet what person possessed of sound judgment, or even of the common exercise of reason, would argue from this that it has a greater concern in justification? The power of justifying, attached to faith, consists not in the worthiness of the act. Our justification depends solely on the mercy of God and the merit of Christ, which when faith apprehends, it is said to justify us. Now, if we ask our adversaries in what sense they attribute justification to charity, they will reply, that because it is a duty pleasing to God, the merit of it, being accepted by the Divine goodness, is imputed to us for righteousness. Here we see how curiously their argument proceeds.