between the Father and Son is present. Scriptural support for such a covenant may be found in Psalms 2 and 110, Isaiah 53, Philippians 2:5–11 and Revelation 5:9–10. Some covenant theologians have denied the intra-Trinitarian covenant of redemption, or have questioned the notion of the Son's works leading to the reward of gaining a people for God, or have challenged the covenantal nature of this arrangement. Covenantal signs and seals In Reformed theology, a sacrament is usually defined as a sign and seal of the covenant of grace. Since covenant theology today is mainly Reformed in its outlook, proponents view Baptism and the Lord's Supper as the only two sacraments in this sense, which are sometimes called "church ordinances." Along with the preached word, they are identified as an ordinary means of grace for salvation. The benefits of these rites do not occur from participating in the rite itself (ex opere operato), but through the power of the Holy Spirit as they are received by faith. Sometimes Reformed covenantal theologians define sacrament to include signs and seals of the covenant of works. The Garden of Eden, the tree of life, the tree of knowledge of good and evil, and the Sabbath are commonly considered to be the sacraments of the covenant of works. Lord's Supper The Eucharist or the Lord's Supper was instituted by Jesus at a Passover meal, to which he gave a radical reinterpretation. The festival of Passover commemorates the Israelites' deliverance from Egypt – specifically, how the lamb's blood which God commanded them to place on their door posts caused the Angel of Death to "pass over" their dwellings, so that their firstborn might be spared from the final plague. The New Testament writers understand this event typologically: as the lamb's blood saved the Israelites from the plague, so Jesus' substitutionary death saves God's New Covenant people from being judged for their sins. Calvinism has generally viewed the Eucharist as a mysterious participation in the Real Presence of Christ mediated by the Holy Spirit (that is, real spiritual presence or pneumatic presence). This differs from Roman Catholicism and Lutheranism which believe in the Real Presence as an actual bodily presence of Christ, as well as from the generally Baptist position that the supper is strictly a memorial commemoration. Baptism Paedobaptist Covenant theologians argue that the Abrahamic Covenant is still in force, and that God's covenantal promise "to