Bible Verses About Heart: The Unregenerate is Full of Iniquity

And GOD saw that the wickedness of man was great in the earth, and that every imagination of the thoughts of his heart was only evil continually.

And the LORD smelled a sweet savour; and the LORD said in his heart, I will not again curse the ground any more for man's sake; for the imagination of man's heart is evil from his youth; neither will I again smite any more every thing living, as I have done.

And Eliab his eldest brother heard when he spake unto the men; and Eliab's anger was kindled against David, and he said, Why camest thou down hither? and with whom hast thou left those few sheep in the wilderness? I know thy pride, and the naughtiness of thine heart; for thou art come down that thou mightest see the battle.

Frowardness is in his heart, he deviseth mischief continually; he soweth discord.

An heart that deviseth wicked imaginations, feet that be swift in running to mischief,

They that are of a froward heart are abomination to the LORD: but such as are upright in their way are his delight.

Because sentence against an evil work is not executed speedily, therefore the heart of the sons of men is fully set in them to do evil.

This is an evil among all things that are done under the sun, that there is one event unto all: yea, also the heart of the sons of men is full of evil, and madness is in their heart while they live, and after that they go to the dead.

O Jerusalem, wash thine heart from wickedness, that thou mayest be saved. How long shall thy vain thoughts lodge within thee?

Thy way and thy doings have procured these things unto thee; this is thy wickedness, because it is bitter, because it reacheth unto thine heart.

The heart is deceitful above all things, and desperately wicked: who can know it?

Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.