How do we know the doctrine of sanctification is true?

The truth of the doctrine of sanctification is substantiated both by scriptural testimony and lived experience. Scriptures like 2 Corinthians 5:17 affirm that anyone in Christ is a new creation, indicating a transformative process at work. This transformation is not merely a change in behavior but a profound work of the Holy Spirit, who simultaneously highlights a believer's need for cleansing and empowers them to live in accordance with God’s will.

Moreover, the believer’s day-to-day experiences bear witness to this truth; as they grapple with sin and grow in holiness, they see evidence of the Spirit's work in their lives. This ongoing process aligns with Scripture's teachings about the nature of redemption, reinforcing the belief that sanctification is an active work of God within believers, leading to a deeper reliance on Christ and a growing aversion to sin.