Why must Christians understand their depravity?

The doctrine of total depravity is essential for grasping the Gospel because it highlights humanity's condition post-Fall. Romans 5:12 illustrates that sin entered the world through one man, Adam, resulting in death for all. By recognizing our complete inability to save ourselves, we can fully appreciate the necessity of Christ's work on the cross. Hebrews 9:22 points out that without the shedding of blood, there is no remission of sins. Recognizing our own depravity leads us to understand that we need a Savior, affirming the sufficiency of Christ's atonement for our sins.