Eucharist

The Eucharist, derived from the Koine Greek word eucharistía meaning 'thanksgiving,' is a central Christian rite regarded as a sacrament by the Catholic Church and many other Christian traditions. Also known as Holy Communion, the Blessed Sacrament, or the Lord's Supper, it involves the consecration and consumption of bread and wine, which Catholic teaching holds to become truly the body and blood of Jesus Christ. The rite stands at the heart of Catholic worship and is distinguished by the Church's doctrine of transubstantiation, which holds that the substances of bread and wine are wholly transformed into the substance of Christ's body and blood while the outward appearances — including color, taste, feel, and smell — remain unchanged. Christians across traditions broadly recognize a special presence of Christ in this rite, though they differ considerably about the nature, manner, and moment of that presence.

According to the New Testament and the witness of the synoptic Gospels, the Eucharist was instituted by Jesus Christ at the Last Supper, the evening before his crucifixion, which took place in the context of a Passover meal. At that gathering, Jesus gave his disciples bread and wine, identifying the bread as 'my body' and the cup of wine as 'the blood of my covenant, which is poured out for many,' and commanded them to 'do this in memory of me.' These scriptural accounts have served as the foundational warrant for the Eucharistic practice of Christian communities from the earliest centuries. The elements used in the celebration have varied across traditions: sacramental bread — either leavened or unleavened — and sacramental wine are employed in Catholic, Anglican, Lutheran, Eastern Orthodox, and Oriental Orthodox practice, while other Christian communities have adopted different substances. The consecrated elements are understood as the product of the Eucharistic Prayer proclaimed over them. From this common scriptural origin, diverse theological interpretations developed across Christian history, making the Eucharist both a source of shared identity and a point of significant doctrinal divergence.

The Catholic Church understands the Eucharist as the body and blood of Christ present under the species of bread and wine. The distinctive Catholic doctrine of transubstantiation teaches that, through the act of consecration, the very substances of the bread and wine actually become the substances of Christ's body and blood, even as the accidents — the sensory qualities such as appearance, taste, and texture — remain those of bread and wine. This teaching distinguishes the Catholic position from those of other traditions. Lutheran theology, for example, holds that the true body and blood of Christ are really present 'in, with, and under' the forms of the bread and wine, a position known as sacramental union, while Reformed Christians affirm a real spiritual presence of Christ in the Eucharist. Anglican eucharistic theologies universally affirm the real presence of Christ, though Evangelical Anglicans understand this as a spiritual presence and Anglo-Catholics hold to a corporeal one. Eastern Orthodox and Oriental Orthodox churches likewise affirm that an objective change of the bread and wine into the body and blood of Christ takes place, though their precise theological formulations differ from the Latin scholastic framework. Within the Catholic tradition, the Eucharist is celebrated on an altar, and the consecrated elements are consumed by the faithful as an act of communion with Christ and with one another.

The Eucharist has occupied a central place in the ongoing ecumenical discussions among Christian traditions. As a result of the profoundly different understandings of Christ's presence in the rite, the nature of the consecration, and the proper manner of its celebration, the Eucharist has been described as 'a central issue in the discussions and deliberations of the ecumenical movement.' While it remains a source of division — particularly between Catholic, Protestant, and Orthodox communions — it also represents the deepest aspiration for Christian unity, since all traditions tracing themselves to the Last Supper narrative hold the rite to be of singular importance. For the Catholic Church, the Eucharist stands as the summit and source of Christian life, and its theology continues to inform Catholic liturgy, spirituality, and moral reflection. The diversity of eucharistic theologies across Christianity reflects centuries of scriptural interpretation, conciliar definition, and theological inquiry, and the conversation among traditions about the meaning of Christ's words at the Last Supper continues to shape ecumenical dialogue in the contemporary era.