In a context of scandal and precipitous decline, the Christian church cannot afford to do what it has always done, argues Eugene R. Schlesinger. It must return to its roots and clarify to itself and the general public what its nature and purpose are. Sacrificing the Church provides this clarity by returning to the church’s foundation: Jesus Christ and his crucifixion. It presents a vision of the church in which every aspect of the church’s life flows from and expresses the sacrifice of Jesus Christ. This sacrifice is the basis of every ecclesial experience. It is the form and content of the church’s life, a life which shares in the eternal Trinitarian life of God. By Christ’s sacrifice we are introduced into the divine life, and therefore we must participate in it. This plays out in three key areas of the church’s life: its worship of God (Mass), its mission to the world (mission), and its efforts toward the unity of all people, beginning with divided Christians (ecumenism).