Answer: Although sanctification be inseparably joined with justification₁, yet they differ, in that God in justification imputes the righteousness of Christ₂; in sanctification his Spirit infuses grace, and enables to the exercise thereof₃; in the former, sin is pardoned₄; in the other, it is subdued₅: the one does equally free all believers from the revenging wrath of God, and that perfectly in this life, that they never fall into condemnation₆; the other is neither equal in all₇, nor in this life perfect in any₈, but growing up to perfection.₉

1. 1 Corinthians 6:11; 1 Corinthians 1:30
2. Romans 4:6; Romans 4:8
3. Ezekiel 36:27
4. Romans 3:24-25
5. Romans 6:6; Romans 6:14
6. Romans 8:33-34
7. 1 John 2:12-14; Hebrews 5:12-14;
8. 1 John 1:8; 1 John 1:10
9. 2 Corinthians 7:1; Philippians 3:12-14

For further study see:

1. WSC 32: What benefits do they that are effectually called partake of in this life?
2. WSC 33: What is justification?
3. WSC 36: What are the benefits which in this life do accompany or flow from justification, adoption, and sanctification?
4. WLC 70: What is justification?
5. WLC 71: How is justification an act of God’s free grace?
6. WCF CHAPTER 11:  Of Justification
7. WSC35: What is sanctification?
8. WSC 36: What are the benefits which in this life do accompany or flow from justification, adoption, and sanctification?
9. WLC 75: What is sanctification?
10. WLC 78: Whence arises the imperfection of sanctification in believers
11. WCF CHAPTER 13: Of Sanctification