Q: 16. Why must he be very man, and also perfectly righteous?
A: Because the justice of God requires that the same human nature which has sinned, should likewise make satisfaction for sin; and one, who is himself a sinner, cannot satisfy for others.
Q: 17. Why must he in one person be also very God?
A: That he might, by the power of his Godhead sustain in his human nature, the burden of God’s wrath; and might obtain for, and restore to us, righteousness and life.
Q: 18. Who then is that Mediator, who is in one person both very God, and a real righteous man? A: Our Lord Jesus Christ: “who of God is made unto us wisdom, and righteousness, and sanctification, and redemption.”
Q: 19. From where do you know this?
A: From the holy gospel, which God himself first revealed in Paradise; and afterwards published by the patriarchs and prophets, and represented by the sacrifices and other ceremonies of the law; and lastly, has fulfilled it by his only begotten Son.