Why do we sin after salvation?

“This is the conflicted experience of all believers of all times and in all places.” —Abraham Kuruvilla. Every Christian is like Spider-Man. Not because we shoot webs, but because we live with a fundamental identity crisis. We've been supernaturally transformed—united with Christ in baptism—yet we still struggle with the same old problems. Why it matters: The gap between our new identity in Christ and our ongoing battle with sin creates confusion and discouragement. Understanding how sanctification actually works is crucial for faithful Christian living. Here's the sanctification tension: We've been genuinely cured. Union with Christ in baptism is a real, completed work of God. We're no longer under sin's ultimate authority or the law's condemnation. Christ took on that condemnation—death—so we're freed from both sin and the law's condemning power. But we still experience the effects. Even though we're united with Christ, sin still "has its ...