Venerable Fulton Sheen
“To every infant at the breast, the mother virtually says: ‘Take, eat and drink; this is my body and blood.’ The mother would be untrue to nature if she said, ‘This represents my body,’ knowing that it is her body. So too, the Lord would be untrue to fact if He said: ‘This is not My Body and Blood. It is only a representation or a symbol of it.’ The analogy with the mother, however, breaks completely down, because here a nourishment is on the same level, that of the human with the human. But in the Eucharist, the nourishment is on two different levels: The divine and the human.”
Source: Ven. Fulton Sheen, These are the Sacraments