What does the Bible say about sin and sanctification?

Romans 7:13 demonstrates that sin's exceeding sinfulness becomes apparent to believers as they grow in holiness. As they deepen their relationship with God, they recognize their own depravity and confront the subtle sins that dwell within. This awareness of sin, rather than leading to despair, propels believers toward greater holiness and dependence on Christ. The progression of sanctification involves a growing hatred for sin and an urgent desire to overcome it, revealing God's work in the believer's life.