-- G. K. Chesterton, G. F. Watts
- - - - - - - - - -Faith seeks understanding; so you may now say to me: "We know from whom our Lord Jesus Christ took his flesh—it was from the Virgin Mary. As a baby, he was suckled, he was fed, he developed, he came to young man's estate. He was slain on the cross, he was taken down from it, he was buried, he rose again on the third day. On the day of his own choosing, he ascended to heaven, taking his body with him; and it is from heaven that he will come to judge the living and the dead. But now that he is there, seated at the right hand of the Father, how can bread be his body? And the cup, or rather what is in the cup, how can that be his blood?"
These things, my friends, are called sacraments, because our eyes see in them one thing, our understanding another. Our eyes see the material form; our understanding, its spiritual effect. If, then, you want to know what the body of Christ is, you must listen to what the apostle tells the faithful: Now you are the body of Christ, and individually you are members of it.
If that is so, it is the sacrament of yourselves that is placed on the Lord's altar, and it is the sacrament of yourselves that you receive. You reply "amen" to what you are, and thereby agree that such you are. You hear the words "the body of Christ," and you reply "amen." Be, then, a member of Christ's body, so that your "amen" may accord with the truth.
-- Augustine of Hippo, Sermon 272