They are darkened in their understanding and separated from the life of God because of the ignorance that is in them due to the hardening of their hearts.
Having lost all sensitivity, they have given themselves over to sensuality so as to indulge in every kind of impurity, with a continual lust for more.
Ephesians 4:18,19 NIV
But the people's minds were hardened, and even to this day whenever the old covenant is being read, a veil covers their minds so they cannot understand the truth. And this veil can be removed only by believing in Christ. Yes, even today when they read Moses' writings, their hearts are covered with that veil, and they do not understand.
But whenever anyone turns to the Lord, then the veil is taken away.
2 Corinthians 3:14-16 NLT
The way of the wicked is as darkness:
they know not at what they stumble.
Proverbs 4:19 KJV
Woe to you, scribes and Pharisees, hypocrites! For you tithe mint and dill and cummin, and have neglected the weightier provisions of the law: justice and mercy and faithfulness; but these are the things you should have done without neglecting the others. You blind guides, who strain out a gnat and swallow a camel!
Matthew 23:23,24 NASB
Thanks be unto God for His wonderful gift:
Jesus Christ, the only begotten Son of God
is the object of our faith; the only faith
that saves is faith in Him.