Jesus is not present in the sacred host in miniature, a tiny and shrunken Jesus. He is there in the fullness of his glorified Person, but in a spiritualized way, without any extension in space. He has no height nor breadth, nor thickness. Jesus does not multiply himself so that there are many Jesuses; nor does he divide himself up among the many hosts. There is but one Jesus, whole and undivided. His multilocation is not the result of multiplication or division; it is the result of the suspension of the laws of space as far as his sacred body is concerned. It is as though his himself stayed in one place, and all parts of space were brought to him, were pinpointed in him. It is easy to see why the Holy Eucharist is called—and is—the sacrament of unity. When we receive Holy Communion, we are where Jesus is; we and our fellow communicants all over the world. Space has dissolved for us, and we are there together—one in Christ.
The Faith Explained, Leo Trese, Scepter Press, p. 363