What does the Bible say about the wickedness of the human heart?

Jeremiah 17:9 explicitly informs us that the heart is deceitful above all things and desperately wicked, highlighting the deep-rooted corruption that exists within humanity. This verse underscores that we, as humans, often do not comprehend the extent of the wickedness in our own hearts. The narrative of Joseph and his brothers illustrates this truth, as their malice and hatred culminated in conspiracy against their own brother. In reflecting on this, we are reminded of the intrinsic need for divine grace and the transformative power of the gospel to change our hearts.