'Understanding' in the Bible

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.

We do not have the audacity to put ourselves in the same class or compare ourselves with some who [supply testimonials to] commend themselves. When they measure themselves by themselves and compare themselves with themselves, they lack wisdom and behave like fools.