Romans 12:6

"In proportion to our faith" not only applies to prophecy but may be extended by analogy to all the gifts.

"Prophecy" means primarily the explanation of things which are unclear, whether future or past, whether present or hidden. "Prophecy" may also refer to the interpretation of a prophet's words.

"Having then gifts differing according to the grace of God that is given unto us, whether prophecy, let us prophesy according to the proportion of faith." Since then he had sufficiently comforted them, he wishes also to make them vie with each other, and labor more in earnest, by showing that it is themselves that give the grounds for their receiving more or less. For he says indeed that it is given by God (as when he says, "according as God hath dealt to every man the measure of faith;" and again, "according to the grace given unto us") that he may subdue the haughty. But he says also that the beginnings lie with themselves, to rouse the listless. And this he does in the Epistle to the Corinthians also, to produce both these emotions. For when he saith, "covet earnestly the gifts," he shows that they were themselves the cause of the differences in what was given. But when he says, "Now all these things worketh one and the selfsame Spirit, dividing to every man severally as he will", he is proving that those who have received it ought not to be elated, so using every way open to him to allay their disorder. And this he does here also. And again, to rouse those who have fallen drowsy, he says, "Whether prophecy, let us prophesy according to the proportion of faith." For though it is a grace, yet it is not poured forth at random, but framing its measure according to the recipients, it letteth as much flow as it may find the vessel of faith that is brought to be capable of.

Then when he says, having gifts, he explains in more detail the previous general admonition to use grace in a sober and moderate way. First, he sets out the variety of graces: we are, I say, members one of another, not on account of the …

He did not say: having gifts greater or lesser, but "different." Thus by the very name he humbles those who exalt themselves! And he does not call them virtues, but "gifts." What you received, he says, is a gift of God, and not your own …

But it seems here to mean the ordinary gift of expounding scripture. Let us prophesy according to the analogy of faith - St. Peter expresses it, "as the oracles of God;" according to the general tenor of them; according to that grand scheme of doctrine which is delivered therein, touching original sin, justification by faith, and present, inward salvation.

Having then gifts, differing,....

Preaching refers to the eternal condition of the children of men, points directly at a future state. Now those that preach the word must do it according to the proportion of faith -- kata ten analogian tes pisteos, that is, [1.] As to the manner of our prophesying, it must be according to the proportion of the grace of faith.

Having then gifts differing, etc. - As the goodness of God, with this view of our mutual subserviency and usefulness, has endowed us with different gifts and qualifications, let each apply himself to the diligent improvement of his particular office and talent, and modestly keep within the bounds of it, not exalting himself or despising others.

Having then gifts differing according to the grace given to us--Here, let it be observed, all the gifts of believers alike are viewed as communications of mere grace. whether--we have the gift of prophecy--that is, of inspired teaching (as in Ac 15:32).

Having then gifts - All the endowments which Christians have are regarded by the apostle as gifts. God has conferred them; and this fact, when properly felt, tends much to prevent our thinking of ourselves more highly than we ought to think, Rom 12:3. For the use of the word rendered “gifts,” see Rom 1:11; Rom 5:15-16; Rom 6:23; Rom 11:29; 1Co 7:7; 1Co 12:4, 1Co 12:9,1Co 12:28, etc. It may refer to natural endowments as well as to the favors of grace; though in this place it refers doubtless to the distinctions conferred on Christians in the churches. Differing - It was never designed that all Christians should be equal. God designed that people should have different endowments. The very nature of society supposes this. There never was a state of perfect equality in any thing; and it would be impossible that there should be, and yet preserve society. In this, God exercises a sovereignty, and bestows his favors as he pleases, injuring no one by conferring favors on others; and holding me responsible for the right use of what I have, and not for what may be conferred on my neighbor. According to the grace - That is, the favor, the mercy that is bestowed on us. As all that we have is a matter of grace, it should keep us from pride; and it should make us willing to occupy our appropriate place in the church. True honor consists not in splendid endowments, or great wealth and function. It consists in rightly discharging the duties which God requires of us in our appropriate sphere. […]