1 Peter 2:15

15For so is the will of God He returns to his former doctrine, lest an occasion should be given to the unbelieving to speak evil, though he expresses less than what he had said before; for he says only that the mouths of the foolish ought to be stopped. The phrase which he adopts, “to stop up ignorance,” though it may seem harsh on account of its novelty, does not yet obscure the sense. (28) For he not only calls the unbelieving foolish, but also points out the reason why they slandered, even because they were ignorant of God. But inasmuch as he makes the unbelieving to be without understanding and reason, we hence conclude, that a right understanding cannot exist without the knowledge of God. How much soever, then, the unbelieving may boast of their own acuteness, and may seem to themselves to be wise and prudent, yet the Spirit of God charges them with folly, in order that we may know that, apart from God, we cannot be really wise, as without him there is nothing perfect.

But he prescribes the way in which the evil-speaking of the unbelieving is to be restrained, even by well-doing, or, by doing good. In this expression he includes all the duties of humanity and kindness which we ought to perform towards our neighbors. And in these is included obedience to magistrates, without which concord among men cannot be cultivated. Were any one to object and say, that the faithful can never be so careful to do good, but that they will be evil-spoken of by the unbelieving: to this the obvious answer is, that the Apostle here does not in any degree exempt them from calumnies and reproaches; but he means that no occasion of slandering ought to be given to the unbelieving, however much they may desire it. And lest any one should further object and say, that the unbelieving are by no means worthy of so much regard that God’s children should form their life to please them, Peter expressly reminds us that we are bound by God’s command to shut up their mouths.