Origen of Alexandria

For so long as a man does not attend to the spiritual meaning “a veil lies upon his heart,” in consequence of which veil, in other words his duller understanding, the Scripture itself is said or thought to be veiled. This is the explanation of the veil which is said to have covered the face of Moses when he was speaking to the people, that is, when the law is read in public. But if we turn to the Lord, where also the Word of God is and where the Holy Spirit reveals spiritual knowledge, the veil will be taken away, and we shall then with unveiled face behold in the holy Scriptures the glory of the Lord.