Melchizedek's bread and wine, korban todah, korban pesach, the sacrifice of the red heifer, the Old Testament manna and the New Testament True Bread from Heaven, Malachi's "pure offering" -- all these sacrificial effects, gifts, and prophecies were brought together when Christ instituted the Mass at His Last Supper and then, on that same Jewish day, shed His blood for the remission of sin. At the Sacrifice of the Mass, we eat the body of Christ in a form whose "accidents" look like bread and wine after the order of Melchizedek, and whose very name, "Eucharist," means "Thanksgiving" (todah) -- as He commanded us to do. St. John the Divine's vision of our Lord, glorified and ascended, is that of a "Lamb as it had been slain" (Revelation 5:6) in a Heaven with an altar (Revelation 8:3), where He offers Himself to us in "hidden manna" (Revelation 2:17), the Eucharist.