16 As free This is said by way of anticipation, that he might obviate those things which are usually objected to with regard to the liberty of God’s children. For as men are naturally ingenious in laying hold on what may be for their advantage, many, at the commencement of the Gospel, thought themselves free to live only for themselves. This doting opinion, then, is what Peter corrects; and he briefly shews how much the liberty of Christians differed from unbridled licentiousness. And, in the first place, he denies that there is any veil or pretext for wickedness, by which he intimates, that there is no liberty given us to hurt our neighbors, or to do any harm to others. True liberty, then, is that which harms or injures no one. To confirm this, he declares that those are free who serve God. It is obvious, hence, to conclude, that we obtain liberty, in order that we may more promptly and more readily render obedience to God; for it is no other than a freedom from sin; and dominion is taken away from sin, that men may become obedient to righteousness.
In short, it is a free servitude, and a serving freedom. For as we ought to be the servants of God, that we may enjoy this benefit, so moderation is required in the use of it. In this way, indeed, our consciences become free; but this prevents us not to serve God, who requires us also to be subject to men.