Augustine of Hippo
Catena Aurea · Matthäusevangelium 26
And as they were eating, Jesus took bread, and blessed it, and brake it, and gave it to the disciples, and said, Take, eat; this is my body. PSEUDO-DIONYSIUS. (Eccl. Hier. 3. in fin.) In this is also shewn, that the one and uncompounded Word of God came to us compounded and visible by taking human nature upon Him, and drawing to Himself our society, made us partakers of the spiritual goods which He distributed, as it follows, And gave to his disciples.
i And said, Take, eat; The Lord invites His servants to set before them Himself for food. But who would dare to eat his Lord? This food when eaten refreshes, but fails not; He lives after being eaten, Who rose again after being put to death. Neither when we eat Him do we divide His substance; but thus it is in this Sacrament. The faithful know how they feed on Christ’s flesh, each man receives a part for himself. He is divided into parts in the Sacrament, yet He remains whole; He is all in heaven, He is all in thy heart. They are called Sacraments, because in them what is seen is one thing, what is understood is another; what is seen has a material form, what is understood has spiritual fruit.