Nevertheless when it shall turn to the Lord, the vail shall be taken away.

People's New Testament

3:16 When it shall turn to the Lord. The heart.

The vail shall be taken away. Then the veil of blindness will fall away so that they will see clearly.

Wesley's Notes

3:16 When it - Their heart. Shall turn to the Lord - To Christ, by living faith. The veil is taken away - That very moment; and they see, with the utmost clearness, how all the types and prophecies of the law are fully accomplished in him.

Jamieson-Fausset-Brown Bible Commentary

16. Moses took off the veil on entering into the presence of the Lord. So as to the Israelites whom Moses represents, "whensoever their heart (it) turns (not as English Version, 'shall turn') to the Lord, the veil is (by the very fact; not as English Version, 'shall be') taken away." Ex 34:34 is the allusion; not Ex 34:30, 31, as Alford thinks. Whenever the Israelites turn to the Lord, who is the Spirit of the law, the veil is taken off their hearts in the presence of the Lord: as the literal veil was taken off by Moses in going before God: no longer resting on the dead letter, the veil, they by the Spirit commune with God and with the inner spirit of the Mosaic covenant (which answers to the glory of Moses' face unveiled in God's presence).

Matthew Henry's Concise Commentary

3:12-18 It is the duty of the ministers of the gospel to use great plainness, or clearness, of speech. The Old Testament believers had only cloudy and passing glimpses of that glorious Saviour, and unbelievers looked no further than to the outward institution. But the great precepts of the gospel, believe, love, obey, are truths stated as clearly as possible. And the whole doctrine of Christ crucified, is made as plain as human language can make it. Those who lived under the law, had a veil upon their hearts. This veil is taken away by the doctrines of the Bible about Christ. When any person is converted to God, then the veil of ignorance is taken away. The condition of those who enjoy and believe the gospel is happy, for the heart is set at liberty to run the ways of God's commandments. They have light, and with open face they behold the glory of the Lord. Christians should prize and improve these privileges. We should not rest contented without knowing the transforming power of the gospel, by the working of the Spirit, bringing us to seek to be like the temper and tendency of the glorious gospel of our Lord and Saviour Jesus Christ, and into union with Him. We behold Christ, as in the glass of his word; and as the reflection from a mirror causes the face to shine, the faces of Christians shine also.

Matthew Henry's Whole Bible Commentary

Verses 12-18

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 (v. 14), and there was a veil upon their hearts, v. 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, v. 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 (v. 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, v. 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 (v. 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.