At the beginning of this book, I argued that the next phase of ecumenical theology moves beyond convergence toward an expansion – possibly even a radical expansion – of what forms of Christian diversity can be considered legitimate. On one hand, I hope this will take the form of an appreciation of a renewed and chastened Catholic theology of sacrifice as an essential part of the church’s inheritance and proclamation of the gospel. I do not think it is necessary for Lutherans, for example, to adopt “sacrifice” as their own terminology, but rather for all Christians to recognize how distinct images like offering and testament may interpret and enrich one another. In this chapter I want to point to the impact of a thanks-centered theology of the eucharistic liturgy on the ecumenical discussion of presence and sacrifice. On the other hand, I hope understanding the eucharistic prayer as an extension of the cosmic, covenant, incarnational-paschal, and eschatological-ecclesial act of thanks and offering will allow new approaches to Protestant liturgy, ecclesiology, and ministry. I can only point toward some of these implications here.