How can we understand the concept of total depravity?

Total depravity, a key Reformed doctrine, asserts that sin has tainted every part of human existence—mind, will, and emotions—rendering us incapable of achieving salvation through our efforts. The dying thief's example underscores this truth; he acknowledges their just punishment while recognizing Jesus' innocence (Luke 23:41). The doctrine highlights that no human merit or righteousness can earn favor with God. Instead, it emphasizes our need for divine intervention, as only God's sovereign grace can bring about the new creation in a sinner's heart, resulting in genuine repentance and faith.