But even unto this day, when Moses is read, the vail is upon their heart.

People's New Testament

3:15 When Moses is read the vail is upon their heart. The law, or Old Testament. They read it in their synagogues, but do not understand it. The trouble, too, is in their heart. They are blinded by their prejudices.

Jamieson-Fausset-Brown Bible Commentary

15. the veil is-rather, "a veil lieth upon their heart" (their understanding, affected by the corrupt will, Joh 8:43; 1Co 2:14). The Tallith was worn in the synagogue by every worshipper, and to this veil hanging over the breast there may be an indirect allusion here (see on [2308]1Co 11:4): the apostle making it symbolize the spiritual veil on their heart.

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.