Moses' shining face and veil
Paul points back to Moses' shining face and veil. He contrasts that account with believers who behold the Lord's glory with unveiled faces.
Now if the ministry of death, which was engraved in letters on stone, came with such glory that the Israelites could not gaze at the face of Moses because of its fleeting glory, will not the ministry of the Spirit be even more glorious? For if the ministry of condemnation was glorious, how much more glorious is the ministry of righteousness!
Exodus 34 says that Moses' face shone after he spoke with the LORD and that he covered it with a veil. Second Corinthians 3 names Moses, the stone tablets, the glory on his face, and the veil as Paul develops his comparison.