The Catholic Church believes in the intrinsic and inseparable bond of the Holy Eucharist and the Church. In reference to its dogmatic Constitution, Lumen Gentium paragraph 11 (LG 11) the Church professes that the Eucharist, which is the body and blood of Jesus Christ, is “the source and summit of Christian life.” Each of these two sacraments effects and builds each other. This implies that as the church celebrates the Eucharist, the members as they partake in the Holy Communion manifest concretely their unity and become one body of Christ. This article seeks to underscore the indissoluble reciprocal causality of the Eucharist and the Church, while it stresses on the Eucharist as the origin, the being, and the destiny of the Church. The study drums home critically the idea that the Eucharist builds the Church, and the Church makes the Eucharist. These are but two complementary terms, the Body of Christ, the Church which lives and continuously builds itself up through the Eucharist, Body of Christ. This great theological theme is one of the central points of a deeper interest in Orthodox, Roman Catholic and Anglican ecclesiology. However, the paper examines critically the reciprocal causality between the Church and the Eucharist from the Catholic perspective as proposed by H. de Lubac, a French theologian. It finally treats the interpenetration of the Eucharist as the Body of Christ and the Church as the Body of Christ from the perspective of sacramental theology.
Keywords: Eucharist, Church, Body of Christ, Interpenetration, Sacramental Theology, Reciprocal Causation.
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