Q. 93. Which are the sacraments of the New Testament?
A. The sacraments of the New Testament are Baptism and the Lord’s Supper.
“For I received from the Lord what I also handed on to you, that the Lord Jesus on the night when he was betrayed took a loaf of bread,” (1 Cor. 11:23)
“Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit,” (Matt. 28:19)
Tradition becomes the initial and fundamental source of Christian theology – not in competition with Scripture, but as Scripture’s spiritual context. . . . The church, as Eucharistic community, existed before the New Testament books were written, and these books were themselves composed in and for concrete local churches. Their written text is meant to be read and understood by baptized, committed people gathered in the name of the lord. Theology, therefore, is not simply a science, using Scripture as initial data; it also presupposes living in communion with God and people, in Christ and in the Spirit, within the community of the church. — John Meyendorff, “Theology in an Eastern Orthodox Perspective”
To better understand the Westminster Short Catechism it is often helpful to look to the other confessions to view their perspective on the question being asked. The Scots Confession speaks to the is question, “As the fathers under the Law, besides the reality of the sacrifices, had two chief sacraments, that is, circumcision and the passover, and those who rejected these were not reckoned among God’s people; so do we acknowledge and confess that now in the time of the gospel we have two chief sacraments, which alone were instituted by the Lord Jesus and commanded to be used by all who will be counted members of his body, that is, Baptism and the Supper or Table of the Lord Jesus, also called the Communion of His Body and Blood. These sacraments, both of the Old Testament and of the New, were instituted by God not only to make a visible distinction between his people and those who were without the Covenant, but also to exercise the faith of his children and, by participation of these sacraments, to seal in their hearts the assurance of his promise, and of that most blessed conjunction, union, and society, which the chosen have with their Head, Christ Jesus.” (The Scots Confession, 3.21)
Dietrich Bonhoeffer speaks to the importance of the sacraments within the life of the church-community, “the body of Christ takes on visible form not only in the preaching of the word but also in baptism and the Lord’s Supper, both of which emanate from the true humanity of our Lord Jesus Christ. In both, Christ encounters us bodily and makes us participants in the community of his body. Both sacraments must be accompanied by the proclamation of the Word. In baptism as well as in the Lord’s Supper the content of that proclamation is the death of Christ for us (Rom. 6:3ff.; 1 Cor. 11:26). The gift we receive in both sacraments is the body of Christ. In baptism we are made members of Christ’s body. In the Lord’s Supper we receive the gift of bodily community with the body of the Lord, and through it bodily community with the members of this body. In receiving the gifts of Christ’s body, we become, thereby, one body with him. Neither the gift of baptism nor the gift of the Lord’s Supper is fully understood if we interpret them only in terms of the forgiveness of sin. The gift of the body conferred in the sacraments presents us with the Lord in bodily form dwelling in his church-community. Forgiveness of sin is indeed a part of this gift of the body of Christ as church-community… Baptism and the Lord’s Supper belong solely to the community of the body of Christ. Whereas the word of proclamation is addressed to believers and unbelievers alike, the sacraments have been given solely to the church-community. The Christian community is thus essentially the community gathered to celebrate baptism and the Lord’s Supper, and only then is it the community gathered in hear the word proclaimed.” - Dietrich Bonhoeffer, Discipleship, First Fortress Press paperback edition, 2003, pp. 228-29.