Covenantal Worship: Holy Signs and Seals

Public worship is a covenantal meeting in which God addresses his people and they answer him. This dialogical character explains the centrality of words in worship. God speaks in the reading and preaching of Scripture, the declaration of pardon, the sacraments, and the benediction. His people respond in confession, prayer, praise, thanksgiving, and offerings. Their response depends entirely upon his prior address: God takes the initiative, and worship is the answer of faith to his gracious Word.

The sacraments belong to the divine side of this dialogue. They are not chiefly human testimonies offered to God, although their reception includes a public profession of faith. They are first God’s visible words to his people. Through material signs joined to his promise, the covenant Lord accommodates himself to human weakness and confirms the gospel to believers.

Covenantal Dialogue and the Word

Everything in covenant worship is ordered by the Word. The covenant itself is established by divine promise, and the relationship proceeds through divine address and human response. Even those elements that employ water, bread, and wine remain forms of the Word, because the elements receive their sacramental significance from God’s institution and promise.

This priority prevents the sacraments from becoming independent rituals. Water by itself is ordinary water; bread and wine by themselves are ordinary food and drink. They become sacramental signs because Christ appoints them, joins his promise to them, and commands the church to use them. The outward action cannot be separated from the Word that explains what God promises and how the sign is to be received.

The Sacraments Are Signs and Seals of the Covenant of Grace

The Heidelberg Catechism defines the sacraments as “visible, holy signs and seals” (Q. 66). Scripture supplies both terms. Circumcision was “a sign of the covenant” between God and Abraham’s household (Gen. 17:11), and Paul calls it “a seal of the righteousness that he had by faith while he was still uncircumcised” (Rom. 4:11). A sign represents and displays a reality beyond itself; a seal authenticates and confirms a promise already given.

The relation may be illustrated by the difference between a flag and a wedding ring. A flag functions chiefly as a sign: it visibly represents a nation. A wedding ring is also a sign, but it has a sealing function because it confirms a prior covenant promise. The ring does not create the marriage by its own power, nor is it an arbitrary ornament. It visibly attests the covenant vows by which the spouses have pledged themselves to one another.

Exodus 12:43–13:10 joins several covenant signs. Circumcision marked membership in the covenant community and was required for participation in the Passover. The Feast of Unleavened Bread then served as a recurring sign: “It shall be to you as a sign on your hand and as a memorial between your eyes” (Exod. 13:9). Israel was to keep the feast so that the Lord’s saving act would not be forgotten. The sign made the history of redemption visible and placed it repeatedly before the covenant people.

The Passover was consequently more than a private exercise of recollection. It was a divinely appointed covenant memorial. God taught Israel through the slain lamb, the blood, the meal, and the unleavened bread. The outward signs proclaimed that the Lord had redeemed his people from bondage and claimed them as his own.

The Centrality of the Promise of the Gospel

The Word of promise always precedes the sacrament. God established his covenant with Abraham in Genesis 15 before giving circumcision in Genesis 17. The sign did not generate the promise; it confirmed a promise already spoken and received by faith. In the same way, the sacraments of the new covenant are appendices to the gospel—not because they are dispensable inventions, but because their entire meaning and efficacy depend upon the promise they signify and seal.

Calvin therefore described a sacrament as an outward sign by which the Lord seals the promises of his goodwill upon believers’ consciences in order to sustain the weakness of their faith. The Heidelberg Catechism preserves the same order: the Holy Spirit works faith in the heart by the preaching of the gospel and confirms it by the use of the holy sacraments (Q. 65).

God knows the frailty of human faith. He does not merely state the promise of forgiveness and eternal life; he places tangible signs before the eyes and into the hands of believers. Baptism visibly depicts cleansing and union with Christ. In the Supper, bread is eaten and wine is drunk as signs of Christ’s body and blood. The invisible benefits announced in the gospel are represented through visible, external actions. The sacraments make the promise clearer to the senses and confirm its certainty to faith.

The Efficacy of the Sacraments

The sacraments possess no automatic or magical power. Their efficacy does not arise from the physical elements, from the mere performance of the rite, or from the office of the minister. Nor may one conclude that every recipient necessarily possesses the saving reality signified. The history of the covenant community itself excludes such an inference: outward participation and inward communion are related, but they are not identical.

Nevertheless, the sacraments are not empty symbols. The Holy Spirit uses them as genuine instruments of grace, applying to the elect the realities they signify. Their efficacy is spiritual and covenantal. The Spirit joins the sign to the promised reality and enables believers to receive Christ and his benefits through faith.

This distinction corresponds to two aspects of covenant membership. The covenant establishes an objective, ecclesial relationship in which people receive its signs, privileges, and obligations. Yet the saving communion of life promised in the covenant belongs to those who embrace Christ by a true and living faith. Sacramental theology must account for both realities without collapsing one into the other.

Who Speaks in These Visible Words?

Because the sacraments are often administered through human hands, it is possible to regard them primarily as human actions. Their deeper logic is the reverse. God is the principal actor. In baptism and the Lord’s Supper, he addresses his people and confirms his gracious promise. The minister serves as a steward of the mysteries of God, but the promise belongs to the covenant Lord.

The fitting posture of the recipient is therefore receptive faith. Believers do not present the sacrament to God as a work that merits favor. They receive what God gives. This receptive character mirrors the gospel itself: salvation is bestowed by grace because of Christ’s one sacrifice and is received through faith alone.

Word and Sacrament

The Late Medieval Imbalance

In late medieval practice, the balance between Word and sacrament had shifted. The Mass—especially the moment of consecration—became the center of worship, while the public reading and preaching of Scripture were often overshadowed. This distortion encouraged superstitions surrounding the Eucharistic elements.

The consecrated host was elevated and adored as though God were locally present in it. Some supposed that merely seeing the host conferred grace apart from eating and believing. Stories attributed miraculous power to the elements themselves, and fragments of consecrated bread were preserved as relics, carried in processions, or treated as protection against calamity. Such practices detached the sacrament from its institution. Christ commanded the bread and wine to be received in faith, not adored as objects possessing inherent power.

The Reformers’ Response

The Reformers restored the primacy of the preached Word. They did not reject the sacraments; they recovered their proper character as visible words. Sacraments must remain joined to the teaching of Scripture because the Word declares the promise, identifies the sign, and calls for faith. The Word governs the sacraments, not the sacraments the Word.

This restoration also recovered intelligent participation. A sacrament is not a ritual that conveys grace through its mere performance. Its proper use includes understanding the gospel promise and receiving it by faith. The church must therefore teach what the sacraments signify rather than permitting the actions to stand unexplained.

Putting the Sacraments in Their Proper Place

The sacraments are secondary to the Word in a precise theological sense. They confirm the gospel but do not originate it. They have no intrinsic efficacy apart from the Word of institution and promise, and their benefits are not received apart from a believing hearing of that Word. They are means of grace, but not magical mechanisms.

The sacraments are also not absolutely necessary for salvation. The thief on the cross was unable to receive them, and providential circumstances may deprive believers of them for a time. Salvation rests upon Christ and is received through faith. Yet this truth gives no warrant for neglect. Christ instituted the sacraments for the good of his church, and believers should receive them gratefully whenever God provides the opportunity.

Nor is a sacrament indispensable to every particular service of public worship. If it were, no service could be complete without its administration. The preaching of the Word, however, is essential because faith comes through hearing the gospel. Sacraments accompany and confirm that preached promise.

The Heidelberg Catechism summarizes their proper place: God instituted these visible, holy signs and seals so that, through their use, he might make believers understand the gospel promise more clearly and seal that promise to them (Q. 66). The promise is that God freely grants forgiveness of sins and eternal life because of Christ’s one sacrifice accomplished on the cross. In the sacraments, God condescends to speak this same gospel in visible form, strengthening faith by joining his appointed signs to his unfailing Word.