Jeremiah 16:12

This evil people, which refuse to hear my words, which walk in the imagination of their heart, and walk after other gods, to serve them, and to worship them, shall even be as this girdle, which is good for nothing.

Yet they hearkened not unto me, nor inclined their ear, but hardened their neck: they did worse than their fathers.

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.

But have walked after the imagination of their own heart, and after Baalim, which their fathers taught them:

For rebellion is as the sin of witchcraft, and stubbornness is as iniquity and idolatry. Because thou hast rejected the word of the Lord, he hath also rejected thee from being king.

But they hearkened not, nor inclined their ear, but walked in the counsels and in the imagination of their evil heart, and went backward, and not forward.

And it came to pass, when the judge was dead, that they returned, and corrupted themselves more than their fathers, in following other gods to serve them, and to bow down unto them; they ceased not from their own doings, nor from their stubborn way.

For from within, out of the heart of men, proceed evil thoughts, adulteries, fornications, murders,

But evil men and seducers shall wax worse and worse, deceiving, and being deceived.

And it come to pass, when he heareth the words of this curse, that he bless himself in his heart, saying, I shall have peace, though I walk in the imagination of mine heart, to add drunkenness to thirst:

Remember thy servants, Abraham, Isaac, and Jacob; look not unto the stubbornness of this people, nor to their wickedness, nor to their sin:

Though a sinner do evil an hundred times, and his days be prolonged, yet surely I know that it shall be well with them that fear God, which fear before him:

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.

Take heed, brethren, lest there be in any of you an evil heart of unbelief, in departing from the living God.

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