5. The outward elements in this sacrament, duly set apart to the uses ordained by Christ, have such relation to him crucified, as that, truly, yet sacramentally only, they are sometimes called by the name of the things they represent, to wit, the body and blood of Christ;1 albeit, in substance and nature, they still remain truly and only bread and wine, as they were before.2
Now as they were eating, Jesus took bread, and after blessing it broke it and gave it to the disciples, and said, “Take, eat; this is my body.” And he took a cup, and when he had given thanks he gave it to them, saying, “Drink of it, all of you, for this is my blood of the covenant, which is poured out for many for the forgiveness of sins. (ESV)
For as often as you eat this bread and drink the cup, you proclaim the Lord's death until he comes.
Whoever, therefore, eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty concerning the body and blood of the Lord. Let a person examine himself, then, and so eat of the bread and drink of the cup.
I tell you I will not drink again of this fruit of the vine until that day when I drink it new with you in my Father's kingdom.” (ESV)
Based on Calendar of Readings in the Westminster Standards by Dr. Joey Pipa. Scripture taken from The Holy Bible, English Standard Version. Copyright ©2001 by Crossway Bibles, a publishing ministry of Good News Publishers. Used by permission. All rights reserved.