Answer: It was requisite that the Mediator should be man, that he might advance our nature₁, perform obedience to the law₂, suffer and make intercession for us in our nature₃, have a fellow feeling of our infirmities₄; that we might receive the adoption of sons₅, and have comfort and access with boldness unto the throne of grace₆.

1. Hebrews 2:16
2. Galatians 4:4
3. Hebrews 2:14; Hebrews 7:24-25
4. Hebrews 4:15
5. Galatians 4:5
6. Hebrews 4:16

For further study see:

1. WSC Q21: Who is the Redeemer of God’s elect?
2. WSC Q22: How did Christ, being the Son of God, become man?
3. WSC Q23: What offices doth Christ execute as our Redeemer?
4. WSC Q24: How doth Christ execute the office of a prophet?
5. WSC Q25: How doth Christ execute the office of a priest?
6. WSC Q26: How doth Christ execute the office of a king?
7. WSC Q27: Wherein did Christ’s humiliation consist?
8. WSC Q28: Wherein consisteth Christ’s exaltation?
9. WSC 34: What is adoption?
10. WSC 36: What are the benefits which in this life do accompany or flow from justification, adoption, and sanctification?
11. WLC 39: Why was it requisite that the Mediator should be man?
12. WLC 74: What is adoption?
13. WCF CHAPTER 12: Of Adoption