What does the Bible say about needing a new heart?

In Judges 10:6-16, the passage illustrates Israel's constant rebellion and idolatry, which is reflective of humanity's sinful nature. The universal problem is our heart's condition; we are all dead in sin and need God to create in us a new heart. It is a theme found throughout the Bible where God promises to give His people a new heart—a heart of flesh, replacing the heart of stone (Ezekiel 36:26). Such transformation is essential for genuine salvation. Without this new heart, we are merely 'religious sinners' without spiritual life or understanding.