A multiple choice question: Why do we call the meal Jesus took with his disciples in the upper room the Last Supper?
A) Because it was the last meal Jesus took on earth.
B) Because it was the last meal Jesus and his disciples took together.
C) Because it abolished the rite of the Seder meal and instituted the Supper of the Lord.
The answer, I believe, is C. A and B are obviously false (see John 21: 13). If you read the text (e.g. Matthew 26: 26-28), it is evident that the Last Supper could just as well be called the First Supper “of the New Testament.” Henceforth a child of God will not eat the flesh of a lamb. He will eat the flesh of the Lamb of God. Henceforth a child of God will mark the doorway to himself (i.e. his mouth) by drinking the blood of that Lamb. Thus will he notify the Angel of Death that he is not an Egyptian.
Every institution entails an abolition. Every beginning entails an ending. The Last Supper was the end (and the beginning) of an Age.