Book 4 of 4 - External Means by which God Invites Us into the Society of Christ and Holds Us Therein
Chapter 17 - The Lord's Supper; what it brings to us
35-37 - Adoration of elements is a forbidden superstition
35. They say if Jesus' body is in the bread, then He is in the bread, so it should be adored as Jesus. But Jesus said to receive and eat, not to adore the bread.
36. It isn't safe "to wander from God's simple word to the "fantasies of our own brains." Instead of adoring the elements, we should raise our hearts to heaven, where Jesus is - Col 3:1-2. Adoring the elements violates Rom 1:25, and makes the bread "a hateful idol."
37. Superstition makes no end of sinning, once it gets "past the proper bounds." The words "This is My body" are to be defined in part by the following command to "take and eat." Thus we don't adore the bread as His body.