Chapter 27 — Lord's Day 27
Section 78. Q. 78: Do the bread and wine become the very body and blood of Christ? A. No. Just as the water of baptism is not changed into Christ's blood and does not itself wash away sins but is simply God's sign and assurance, so too the bread of the Lord's Supper is not changed into the very body of Christ even though it is called the body of Christ in keeping with the nature and language of sacraments.