A central part of what we have here in the Supper is the reality of the koinonia of God’s people. This partaking, this communion, is the reality found in the one loaf of bread. You are called, in the observance of this Supper, to discern the Lord’s body. This does not mean that you are to try to see the Lord’s physical body at the right hand of the Father with your physical eyes. Not one of us can see that far. We do see Him by faith, and so this is part of what we do, but it is not the center of this fellowship meal. Nor are we to see the Lord’s body transforming the physical bread and physical wine, as though metaphysical changes are being wrought on this Table here. We cannot see that because it is not happening.
The central duty before us is not to see the Lord’s body in the bread, but rather in the ritual of all of us eating this bread together. We do not see this wine as blood, but we do see the blood of the Lord in the ritual of all of us drinking together.
If you curl up into a cocoon in order to meditate on your own spiritual problems, then you are misunderstanding the point of the Supper. Partake with your eyes open. Look around. But you do not look around in order to see all the bread, all the wine. Nor do you look around to see all the people. Rather, you look around and see all the saints of God eating bread together. You look around and see all the saints of God drinking wine together. And so what do you see? The salvation of the world.