When a priest pronounces the words of Eucharistic consecration at Mass, the bread and wine, by the power of the Holy Spirit, are changed into the Body and Blood of Christ, which were given for us in sacrifice. At the Last Supper, Jesus’ words and power made Him really and substantially present under the outward appearances of bread and wine …

The Church celebrates the Eucharist in obedience to the words of Jesus at the Last Supper: “Do this in remembrance of me” (Luke 22:19). At this time, Jesus gave the Apostles both the command and the power to bring the Eucharist to us. The celebration of the Eucharist is the Church’s way of doing what Jesus did at the Last …

The Holy Eucharist is the Sacrament of the Body and Blood of Jesus Christ. Under the appearance of bread and wine, the Body, Blood, Soul, and Divinity of Christ are really, truly, and substantially present for the nourishment of souls and as a sacrifice of the Church.