How can anyone understand the truth when a veil gets in the way and blocks any understanding? There is only one way:
2 Corinthians 3:16-18 But whenever someone turns to the Lord, the veil is taken away. For the Lord is the Spirit, and wherever the Spirit of the Lord is, there is freedom. So all of us who have had that veil removed can see and reflect the glory of the Lord. And the Lord—who is the Spirit—makes us more and more like him as we are changed into his glorious image.
This veil has the same effect as the one worn by Moses after meeting with God—to cover the glory of God that was shining from his face. Paul explained that things are different now:
2 Corinthians 3:13 We are not like Moses, who put a veil over his face so the people of Israel would not see the glory, even though it was destined to fade away.
The veil Moses wore was a physical veil. The modern veil is a spiritual one. While Paul explained that it kept Jews from understanding God’s glory while hearing the Law, it was really a broader issue, and it was (and is) Satan who keeps people from the truth:
2 Corinthians 4:3-4 If the Good News we preach is hidden behind a veil, it is hidden only from people who are perishing. Satan, who is the god of this world, has blinded the minds of those who don’t believe.