[2 Corinthians 4:2] But renounce the hidden things. While he commends his own sincerity, he, on the other hand, indirectly reproves the false Apostles, who, while they corrupted by their ambition the genuine excellence of the gospel, were, nevertheless, desirous of exclusive distinction. Hence the faults, from which he declares himself to be exempt, he indirectly imputes to them. By the hidden things of disgrace, or concealments, some understand the shadows of the Mosaic law. Chrysostom understands the expression to mean the vain show, by which they endeavoured to recommend themselves. I understand by it—all the disguises, with which they adulterated the pure and native beauty of the gospel. For as chaste and virtuous women, satisfied with the gracefulness of natural beauty, do not resort to artificial adornings, while harlots never think themselves sufficiently adorned, unless they have corrupted nature, so Paul glories in having set forth the pure gospel, while others set forth one that was disguised, and covered over with unseemly additions. For as they were ashamed of the simplicity of Christ, or at least could not have distinction from true excellencies of Apostles, they framed a new gospel, not unlike a profane philosophy, swelled up with empty bombast, while altogether devoid of the efficacy of the Spirit. Spurious ornaments of this nature, by which the gospel is disfigured, he calls the concealments of disgrace, because the nakedness of those, who have recourse to concealments and disguises, must of necessity be dishonourable and disgraceful.

As to himself, he says that he rejects or disdains disguises, because Christ’s face, the more that it is seen opened up to view in his preaching, shines forth so much the more gloriously. I do not, however, deny, that he alludes at the same time to the veil of Moses, (Exod. 34:33,) of which he had made mention, but he ascribes a quite different veil to the false Apostles. For Moses covered his face, because the excessive brightness of the glory of the law could not be endured by tender and blear eyes. They, on the other hand, put on a veil by way of ornament. Besides, as they would be despicable, nay, infamous, if the simplicity of the gospel shone forth, they, on this account, hide their shame under ever so many cloaks and masks

John Calvin, Commentaries on the Epistles of Paul the Apostle to the Corinthians, trans. John Pringle (repr. Bellingham, WA: Logos Bible Software, 2010), 2.189–90.