In these verses the apostle draws two inferences from what he had said about the Old and New Testament: -
I. Concerning the duty of the ministers of the gospel to use great plainness or clearness of speech. They ought not, like Moses, to put a veil upon their faces, or obscure and darken those things which they should make plain. The gospel is a more clear dispensation than the law; the things of God are revealed in the New Testament, not in types and shadows, and ministers are much to blame if they do not set spiritual things, and gospel-truth and grace, in the clearest light that is possible. Though the Israelites could not look stedfastly to the end of what was commanded, but is now abolished, yet we may. We may see the meaning of those types and shadows by the accomplishment, seeing the veil is done away in, Christ and he is come, who was the end of the law for righteousness to all those who believe, and whom Moses and all the prophets pointed to, and wrote of.
II. Concerning the privilege and advantage of those who enjoy the gospel, above those who lived under the law. For, 1. Those who lived under the legal dispensation had their minds blinded (2 Corinthians 3:14), and there was a veil upon their hearts, 2 Corinthians 3:15. Thus it was formerly, and so it was especially as to those who remained in Judaism after the coming of the Messiah and the publication of his gospel. Nevertheless, the apostle tells us, there is a time coming when this veil also shall be taken away, and when it (the body of that people) shall turn to the Lord, 2 Corinthians 3:16. Or, when any particular person is converted to God, then the veil of ignorance is taken away; the blindness of the mind, and the hardness of the heart, are cured. 2. The condition of those who enjoy and believe the gospel is much more happy. For, (1.) They have liberty: Where the Spirit of the Lord is, and where he worketh, as he does under the gospel-dispensation, there is liberty (2 Corinthians 3:17), freedom from the yoke of the ceremonial law, and from the servitude of corruption; liberty of access to God, and freedom of speech in prayer. The heart is set at liberty, and enlarged, to run the ways of God's commandments. (2.) They have light; for with open face we behold the glory of the Lord, 2 Corinthians 3:18. The Israelites saw the glory of God in a cloud, which was dark and dreadful; but Christians see the glory of the Lord as in a glass, more clearly and comfortably. It was the peculiar privilege of Moses for God to converse with him face to face, in a friendly manner; but now all true Christians see him more clearly with open face. He showeth them his glory. (3.) This light and liberty are transforming; we are changed into the same image, from glory to glory (2 Corinthians 3:18), from one degree of glorious grace unto another, till grace here be consummated in glory for ever. How much therefore should Christians prize and improve these privileges! We should not rest contented without an experimental knowledge of the transforming power of the gospel, by the operation of the Spirit, bringing us into a conformity to the temper and tendency of the glorious gospel of our Lord and Saviour Jesus Christ