As to perseverance, it would undoubtedly have been regarded as the gratuitous gift of God, had not the very pernicious error prevailed, that it is bestowed in proportion to human merit, according to the reception which each individual gives to the first grace. This having given rise to the idea that it was entirely in our own power to receive or reject the offered grace of God, that idea is no sooner exploded than the error founded on it must fall. The error, indeed, is twofold. For, besides teaching that our gratitude for the first grace and our legitimate use of it is rewarded by subsequent supplies of grace, its abettors add that, after this, grace does not operate alone, but only co-operates with ourselves. As to the former, we must hold that the Lord, while he daily enriches his servants, and loads them with new gifts of his grace, because he approves of and takes pleasure in the work which he has begun, finds that in them which he may follow up with larger measures of grace. To this effect are the sentences, "To him that has shall be given." "Well done, good and faithful servant: thou hast been faithful over a few things, I will make thee ruler over many things," (Mathew. 25: 21, 23, 29; Luke 19: 17, 26.)
But here two precautions are necessary. It must not be said that the legitimate use of the first grace is rewarded by subsequent measures of grace, as if man rendered the grace of God effectual by his own industry, nor must it be thought that there is any such remuneration as to make it cease to be the gratuitous grace of God. I admit, then, that believers may expect as a blessing from God, that the better the use they make of previous, the larger the supplies they will receive of future grace; but I say that even this use is of the Lord, and that this remuneration is bestowed freely of mere good will. The trite distinction of operating and co-operating grace is employed no less sinistrously than unhappily. Augustine, indeed, used it, but softened it by a suitable definition, viz., that God, by co-operating, perfects what he begins by operating,—that both graces are the same, but obtain different names from the different manner in which they produce their effects. Whence it follows, that he does not make an apportionment between God and man, as if a proper movement on the part of each produced a mutual concurrence. All he does is to mark a multiplication of grace. To this effect, accordingly, he elsewhere says, that in man good will precedes many gifts from God; but among these gifts is this good will itself. (August. Enchiridion ad Laurent. cap. 32.) Whence it follows, that nothing is left for the will to arrogate as its own. This Paul has expressly stated. For, after saying, "It is God which worketh in you both to will and to do," he immediately adds, "of his good pleasure," (Philip. 2: 13;) indicating by this expression, that the blessing is gratuitous.
As to the common saying, that after we have given admission to the first grace, our efforts co-operate with subsequent grace, this is my answer:—If it is meant that after we are once subdued by the power of the Lord to the obedience of righteousness, we proceed voluntarily, and are inclined to follow the movement of grace, I have nothing to object. For it is most certain, that where the grace of God reigns, there is also this readiness to obey. And whence this readiness, but just that the Spirit of God being everywhere consistent with himself, after first begetting a principle of obedience, cherishes and strengthens it for perseverance? If, again, it is meant that man is able of himself to be a fellow-labourer with the grace of God, I hold it to be a most pestilential delusion.