Bible Verses About Reproof: Hardness of heart
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All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
For the commandment is a lamp; and the law is light; and reproofs of instruction are the way of life:
Whoso loveth instruction loveth knowledge: but he that hateth reproof is brutish.
The rod and reproof give wisdom: but a child left to himself bringeth his mother to shame.
And say, How have I hated instruction, and my heart despised reproof;
Verses on Hardness of heart
And when Jesus knew it, he saith unto them, Why reason ye, because ye have no bread? perceive ye not yet, neither understand? have ye your heart yet hardened?
Afterward he appeared unto the eleven as they sat at meat, and upbraided them with their unbelief and hardness of heart, because they believed not them which had seen him after he was risen.