His institution of this sacrament repeats in each holy mass, when is called forth the moment of the last supper, when he took the bread, the wine and changed in his flesh and blood (in unable to see manner). He said "Do this for my commemoration".
Religion
The light or candle over the tabernacle tells you Jesus is present. At mass, Jesus is present in the Eucharist; also in the scripture readings.
The Most Holy Eucharist is Our Blessed Lord, Jesus Christ, appearing under the appearances of Bread and Wine. It is really and truly 100% Jesus in His Divinity and His Humanity, Body and Blood, fully present in each separately and individually just as much as He was present on the Cross 2,000 years ago to His Blessed Mother, and the soldiers.
Jesus is present in the WORD (readings and Gospel).Jesus is present in the PEOPLE.Jesus is substantially present in the EUCHARIST (Body and Blood).
Jesus' body and blood in the form of bread and wine at Eucharist
The sacrament by which Jesus truly becomes present to us is the Eucharist. In this sacrament, bread and wine are consecrated and transformed into the actual Body and Blood of Christ, allowing believers to receive Him in a profound and intimate way. This mystery of faith underscores the belief in Christ's real presence among His followers during the celebration of the Mass.
Eucharist/Holy Communion
The Eucharist is important to Catholics because Christ is important to Catholics. You see, the Catholic Church teaches the doctrine of the real Presence, which means that Catholics believe that the host is not a mere symbol of the Body of Christ, and the wine of the blood. They are really and truly the body, blood, soul and divinity of Jesus Christ sacramentally present under the appearance of bread and wine.
The church says that the Eucharist is the body of Jesus, so in essence, the Eucharist is holy
Jesus first celebrated the Eucharist at the Last Supper on Holy Thursday in anticipation of His sacrifice on the cross.
Jesus is present under the appearance's of bread and wine. Jesus knew it would be hard for us to eat actual human flesh drink human blood. here is some information about the Eucharist and how Jesus is truly present (see below).Catholic AnswerThe Eucharist is Jesus: Body and Blood, Soul and Divinity, through a miracle called transubstantiation. In other words, when Jesus pronounced the words, "This IS my Body" over the bread at the Last Supper, the entire substance of the bread ceased to exist, and the entire substance of Jesus' Body now exists there under the "accidents" (philosophy word to mean appearance) of the bread. Re-read the sixth chapter of St. John's Gospel closely, the entire thing, notice that it starts with Jesus feeding the five thousand, this is a "figure" of the Eucharist, then He walks on water to prove to His disciples that He is master over the elements, then He starts the discourse on the Eucharist, including answering the objections - over and over again - of the disbelieving Jews..When it comes right down to it, we really truly do not understand the "HOW", all we really know is that Jesus is God, and that He told us that this is His Body, and so if we are real Christians, we believe what He told us; and the Church has taught and believed this from the very beginning.
Because the Eucharist is Jesus, and that is what Mass is all about.