What does the Bible say about the transformation of saints?

Scripture indicates a profound transformation of believers, as seen in 2 Thessalonians 1:10, where it speaks of Christ being glorified in His saints. This transformation is a work of Jesus, who has saved us from our sins and cleansed us, allowing us to stand before Him perfected. The glory of the saints will be reflected by their astonishment at being washed clean in the blood of the Lamb, highlighting the miraculous change from a state of sin to one of perfection. Our understanding of this transformation deepens when we reflect on the alternative—eternal separation from God for those who do not believe.