Heidelberg Catechism · Lord's Day 6
16. 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. He must be a righteous man because one who is himself a sinner cannot pay for others.
Scripture references
Romans 5:12 · Romans 5:15 · 1 Peter 3:18 · Hebrews 7:26-27 · Isaiah 53:9
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