The One True Mediator, Jesus Christ

The Heidelberg Catechism: Lord's Day 6

16. Question: Why must He be a true and righteous man?

Answer: He must be a true man because the justice of God requires that the same human nature which has sinned should pay for sin. [1] He must be a righteous man because one who himself is a sinner cannot pay for others. [2]

[1] Rom: 5:12, 15; I Cor. 15:21; Heb. 2:14-16. [2] Heb. 7:26, 27; I Pet. 3:18.

17. Question: Why must He at the same time be true God?

Answer: He must be true God so that by the power of His divine nature [1] He might bear in His human nature the
burden of God's wrath, [2] and might obtain for us and restore to us righteousness and life. [3]

[1] Is. 9:5. [2] Deut. 4:24; Nah. 1:6; Ps. 130:3. [3] Is. 53:5, 11; John 3:16; II Cor. 5:21.

18. Question: But who is that Mediator who at the same time is true God and a true and righteous man?

Answer: Our Lord Jesus Christ,[1] whom God made our wisdom, our righteousness and sanctification and redemption (I Corinthians 1:30).

[1] Matt. 1:21-23; Luke 2:11; I Tim. 2:5; 3:16.

19. Question: From where do you know this?

Answer: From the holy gospel, which God Himself first revealed in Paradise. [1] Later, He had it proclaimed by the patriarchs [2] and prophets, [3] and foreshadowed by the sacrifices and other ceremonies of the law. [4] Finally, He had it fulfilled through His only Son.[5]

[1] Gen. 3:15. [2] Gen. 12:3; 22:18; 49:10. [3] Is. 53; Jer. 23:5, 6; Mic. 7:18-20; Acts 10:43; Heb. 1:1. [4] Lev. 1:7; John 5:46; Heb. 10:1-10. [5] Rom. 10:4; Gal. 4:4, 5; Col. 2:17.