When Adam and Eve sinned against the Lord and ate of the fruit, it says in the Genesis account that their “eyes were opened”. Their eyes were opened to their own sin and shame. We know this, because they immediately tried to cover themselves with fig leaves. This of course did not resolve the problem, because what they had seen was a spiritual shame, a separation from God’s very life.
Joseph Ratzinger, in his Spirit of the Liturgy, sees a parallel between this “seeing” of sin and shame, and the episode of the Emmaus road in Luke 24. After his resurrection, Christ met with two of his disciples on the Emmaus road, and that “their eyes were kept from recognizing him” (vs 16). They could not see Christ as he was; it was only after Christ ate with them that they could see.
Luke goes on to say that Jesus “took the bread and blessed and broke it and gave it to them. And their eyes were opened, and they recognized him” (vs 30-31). Ratzinger sees this, first, as a reference to the Lord’s Supper, and second, as a parallel to the “eating” and “seeing” in the Genesis account of the fall.
[A]t the breaking of bread they experience in reverse fashion what happened to Adam and Eve when they ate the fruit of the tree of the knowledge of good and evil: their eyes are opened. Now they no longer see just the externals but the reality that is not apparent to their senses yet shines through their senses: it is the Lord, now alive in a new way.
The Lord’s Supper then is a “reverse seeing” from shame and sin, to redemption and resurrection. The Lord’s Supper is meant reverse the effect of the fall: to open our eyes and unite us to life itself, the risen Lord.