Question 23 - Why must the Redeemer be truly God?
That because of his divine nature his obedience and suffering would be perfect and effective; and also that he would be able to bear the righteous anger of God against sin and yet overcome death.
Answer for kids:
That because of his divine nature his obedience and suffering would be perfect and effective.
God raised him up, loosing the pangs of death, because it was not possible for him to be held by it.
Commentary (from newcitycatechism.com Web App)
Let no one weep for his iniquities, for pardon hath shone forth from the grave. Let no one fear death, for the Saviour’s death hath set us free. In as much as he was held captive of it, he hath annihilated it. By descending into Hell, He made Hell captive. He angered it when it tasted of his flesh. And Isaiah, foretelling this, did cry: Hell, said he, was angered, when it encountered thee. . . . It was angered, for it was abolished. It was angered, for it was mocked. It was angered, for it was slain. It was angered, for it was fettered in chains. It took a body, and met God face to face. It took earth, and encountered Heaven. It took that which was visible, and fell upon the invisible. O Death, where is thy sting? O Hell, where is thy victory? Christ is risen, and thou art overthrown. Christ is risen, and the demons are fallen. Christ is risen, and the Angels rejoice. Christ is risen, and life reigneth.
John Chrysostom (Why must the Redeemer be truly God? | The New City Catechism/#23)
God the Son, because of our sin, we could never bear the wrath of God or overcome death. Only you, the Holy One, could suffer the just punishment for sin and defeat death. Thank you for making a way for us to God, to enjoy him eternally. Amen.