In the 1563 Calvinistic Heidelberg Catechism, Question 16 asks about Christ: "Why must He be a true and sinless man?" The answer is: "Because the justice of God requires that the same human nature which has sinned, should make satisfaction for sin; but no [mere] man, being himself a sinner, could satisfyfor others." Question 17 asks: "Whymust He be at the same time true God?" The answer is: "So that bythe power of His Godhead, He might bear in His manhood the burden of God’s wrath, and so obtain for and restore to us righteousness and life."
Especially in chapter XI of Bullinger’s Second Helvetic Confession is this great Reformed Truth stated. "We detest the heresyof Nestorius, which makes two Christs of one and dissolves the union of the Person…. We do not teach that the divine nature in Christ did suffer…. We do neither think nor teach that the body of Christ ceased to be a true body after His glorifying, or that it was deified and…put off its properties as touching body and soul…. Our Lord Jesus Christ did truly suffer and die for us in the flesh, as Peter says (First Peter 4:1)…. He did not rise up another flesh, but retained a true body. Therefore, while His disciples thought that they did see the spirit of their Lord Christ, He showed them His hands and feet!… Luke 24:39."