We are bound to Christ

"Holy Communion transforms. But it is not the heavenly food which is transformed into the one who eats it; Jesus Christ gives Himself, He comes as a conqueror to transform us into His light and His charity. Here, we have come to the mystery of the union of Christ with souls and with His whole Church. [...]

The Church is Christ diffused in His members. The Church extends Christ by furnishing Him additional humanities in which He displays the riches of His grace, and by which He continues His priestly mission here below. Divine grace, which cannot come to us except through Christ, binds us to Christ and makes us truly His. Thus we belong to Christ, and Christ is God's." 

I Want to See God, pages 76-77.