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.

The Heidelberg Catechism: Lord's Day 5

12. Question: Since, according to God's righteous judgment we deserve temporal and eternal punishment, how can we escape this punishment and be again received into favor?

Answer: God demands that His justice be satisfied.[1] Therefore full payment must be made either by ourselves or by another.[2]

[1] Ex. 20:5; 23:7; Rom. 2:1-11. [2] Is. 53:11; Rom. 8:3, 4.

13. Question: Can we ourselves make this payment?

Answer: Certainly not. On the contrary, we daily increase our debt.[1]

[1] Ps. 130:3; Matt. 6:12; Rom. 2:4, 5.

14. Question: Can any mere creature pay for us?

Answer: No. In the first place, God will not punish another creature for the sin which man has committed.[1] Furthermore, no mere creature can sustain the burden of God's eternal wrath against sin and deliver others from
it.[2]

[1] Ezek. 18:4, 20; Heb. 2:14-18. [2] Ps. 130:3; Nah. 1:6.

15. Question: What kind of mediator and deliverer must we seek?

Answer: One who is a true[1] and righteous[2] man, and yet more powerful than all creatures; that is, one who is at the same time true God.[3]

[1] I Cor. 15:21; Heb. 2:17. [2] Is. 53:9; II Cor. 5:21; Heb. 7:26. [3] Is. 7:14; 9:6; Jer. 23:6; John 1:1; Rom. 8:3, 4.