2 Corinthians 3:7, 11, 14

Now if the ministry of death, engraved in letters on stones [the covenant of the Law which led to death because of sin], came with such glory and splendor that the Israelites were not able to look steadily at the face of Moses because of its glory, [a brilliance] that was fading, [Ex 34:29-35]

For if that [Law] which fades away came with glory, how much more must that [gospel] which remains and is permanent abide in glory and splendor!

But [in fact] their minds were hardened [for they had lost the ability to understand]; for until this very day at the reading of the old covenant the same veil remains unlifted, because it is removed [only] in Christ.