Answer
All of St. John chapter 6 of the New Testament features Christ declaring that people must partake of His flesh and blood which He will give to them. Christ's words are such that the people take His meaning literally and indeed Christ is adamant, encouraging this literal interpretation even when some of His own disciples depart. The apostles themselves know this is no parable, often they ask Christ to expound parables He has told the crowd, but their reaction this time is one that takes his words literally as well. They realize what He has said is impossible and revolting, yet they respond with Faith that He will reveal how this will be done. The manner by which Christ will fulfill His words is found at the Last Supper, when Christ again references His Body and Blood but reveals them to be present in the Bread and Wine used in the Pasch ceremony. Christ is here instituting the sacrifice of the New Law and His declarative words are words of consecration. You can find this institution in full context within the Gospels: St. Matthew chapter 26, St. Mark chapter 14, and St. Luke chapter 22. Even St. Paul speaks of it in 1 Corinthians 11:27-29. The Catholic Church uses these exact words and actions of Jesus which He commissioned his disciples, the leaders of His Church, to do also in order to enact this same sacrament every time the sacrament is celebrated.
Holy Thursday celebrates the institution of the Eucharist.
The institution of marriage, the institution of government, the institution of armed forces, the institution of the Kingdom of God are all institutions seen often in the Bible.
The readings for the Mass on Holy Thursday evening commemorate the Passover, the Last Supper, the institution of the Eucharist, and the institution of the priesthood.Reading I: Exo 12:1-8, 11-14Responsorial Psalm: Psa 116:12-13, 15-16bc, 17-18Reading II: 1 Cor 11:23-26Gospel: Jn 13:1-5Read these different passages and you'll find the stories of Holy Thursday.
On Holy Thursday, we commemorate the Last Supper and the institution of the Eucharist by participating in a special Mass called the Mass of the Lord's Supper. During this Mass, the priest washes the feet of parishioners to symbolize Jesus washing the feet of his disciples, and the Eucharist is consecrated and shared with the faithful in remembrance of the Last Supper.
The Pontifical Biblical Institute is the institution for Bible study in Rome, there is a bilingual homepage below.
The Luminous Mysteries are The Baptism, The Wedding at Cana, The Sermon on the Mount, The Transfiguration, and The Institution of the Eucharist.
The Eucharist is not directly linked to Ash Wednesday. The institution of the Eucharist at the Last Supper is celebrated on Holy Thursday (the Thursday before Easter Sunday). Holy Thursday is toward the end of the season of Lent, and Ash Wednesday is the first day of that season.
The institution of the Catholic priesthood occurred at the Last Supper. The Lord Jesus took bread and wine, and transformed them into his body and blood (Eucharist). The Lord commanded that the apostles to continue to consecrate the Eucharist in remembrance of him. In the Gospel of John (13:15), Jesus also told the apostles "I have given you a model to follow, so that as I have done for you, you should also do." Thus on Holy Thursday, Catholics celebrate the institution of the priesthood.
the season of lent
Holy Thursday when Our Lord took the bread, blessed and broke it and gave it to his disciples saying, "Take and eat of this all of you, this is my body." He did the same with the wine and then told his apostles, " When you do these things, in memory of me you shall do them." The Eucharist was thus established.
the institution of goverment and of family
you can find Bible verses from the Bible, and the internet.