Jeremiah 16:12
And ye have done worse than your fathers; for, behold, ye walk every one after the imagination of his evil heart, that they may not hearken unto me: And ye have done worse than your fathers; for, behold, ye walk every one after the imagination of his evil heart, that they may not hearken unto me:
The verse exposes a deliberate turning from God's will to follow the inclinations of the unsanctified heart. It portrays each person walking after the thoughts of his own evil inner life instead of hearkening to God. This self-directed course is pursued willfully, with the imagination of the heart set above obedience. Such apostasy can persist even when those involved are surrounded by light.