6 Bible Verses about Heart, Of Unregenerate People

Therefore, I was angry with that generation of people and said, 'They always go astray in their hearts, and they did not understand my ways.'

but I know you [well enough], that you do not have a love for God within you.

You do not have any share or involvement in this matter because your heart is not right before God. So, repent [i.e., change your heart and life] of such a terrible thing and pray for the Lord to forgive you for even thinking of such a thing. Perhaps He will [if you are really sincere].

they do not have any sense; they do not keep their promises; they fail to show natural affection; and they are merciless.

This is because the one whose mind is [controlled] by the flesh is an enemy of God; for he is not obedient to God's law, and in fact, cannot obey it.

Pay attention, brothers, so that there will not be in any one of you an evil heart of unbelief, [resulting] in falling away from the living God.