"These are words which concern the very essence of the Eucharist. Behold, Christ came into the world to bestow upon man divine life. He not only proclaimed the Good News but He also instituted the Eucharist which is to make present until the end of time His redeeming mystery. And as the means of expressing this He chose the elements of nature - the bread and wine, the food and drink that man must consume to maintain his life. The Eucharist is precisely this food and drink. This food contains in itself all the power of the Redemption wrought by Christ. In order to live man needs food and drink. In order to gain eternal life man needs the Eucharist. This is the food and drink that transforms man's life and opens before him the way to eternal life. By consuming the Body and Blood of Christ, man bears within himself, already on this earth, the seed of eternal life, for the Eucharist is the sacrament of life in God. Christ says: "As the living Father sent me, and I live because of the Father, so he who eats me will live because of me." (Jn 6:57).
"All the sacraments have a deifying purpose: Baptism introduces the Divine Life into us. Confession restores it when it’s lost through sin. Confirmation strengthens it. Matrimony and Holy Orders give it vocational direction. Anointing of the Sick prepares us for the transition to our heavenly homeland. And the Eucharist is meant to Christify us."
Bishop Robert Barron