a. Lutherans speak about Christ’s “real presence” in the Eucharist and describe Christ’s body and blood as being “in, with and under” the bread and wine (Formula of Concord, SD 7). By this they mean that the bread and the wine really become the body and blood of Christ, through the Words of Institution and the action of the Holy Spirit. Drawing on patristic sources, Lutherans understand Christ’s presence in the elements christologically: “Just as in Christ two distinct, unaltered natures are inseparably united, so in the Holy Supper two essences, the natural bread and the true natural body of Christ, are present together here on earth in the action of the sacrament, as it was instituted” (SD 7). Lutherans, however, maintain a distinction between a personal, hypostatic union and a “sacramental union”, favoring the latter in order to describe Christ’s presence in the Eucharist. Lutheran theology is able to speak of a transformation (mutatio) of bread and wine into the body and blood of Christ (Apology X, 2; XXIV). This is not understood as eliminating the physical character of the bread and wine in the Eucharist. Lutherans emphasize that it is God’s Word which makes the sacrament (Large Catechism, 5: The Sacrament of the Altar).