A meal of bread and wine through which one has κοινωνία with the body and blood of Christ (1 Cor 10:16) has always been a central element in the Christian worship service. Worshippers thus meet the resurrected one through a meal with fairly ordinary ingredients. What is the significance of this liturgical meal for the understanding of how humans are related to God, the world and each other? Since the 16th century, the interpretation of this meal has been heavily contested among different denominations. However, contemporary ecumenical discussion has brought a considerable degree of clarification as far as the original opponents in the 16th century, the Lutherans and the Roman-Catholics, are concerned. To start an investigation of this issue with a rehearsal of Martin Luther's position should therefore today be considered relevant even from an ecumenical perspective. Luther is interesting here also because he clearly was aware of the metaphysical implications of the issues related to the Lord's Supper. In recent years, the French philosopher Jean-Luc Marion has attracted attention through his reinterpretation of the Eucharist from within a phenomenological framework with a strong emphasis on ideas of gift and givenness. His point of orientation is his own Roman-Catholic tradition, but he works with this tradition in a way that is relevant for a wider, ecumenical audience. In addition, he analyzes the Eucharist in a way that makes sense also in a philosophical context. My ambition is thus to bring Luther and Marion in dialogue with each other in a way that highlights the significance of the liturgical celebration of the Eucharist in a way that makes sense both theologically, ecumenically and philosophically. Both Luther and Marion emphasize the significance of divine presence in the Eucharist, but they do it from differing perspectives that so far have not been brought in contact with each other. My contribution aims at filling this gap.