Covenant Continuity and the Sacramental Signs: Circumcision and Baptism in Reformed Biblical Theology

Covenant Continuity and the Sacramental Signs: Circumcision and Baptism in Reformed Biblical Theology

Jack Kettler

Abstract

This article examines the relationship between circumcision and baptism as covenant signs within a Reformed theological framework. Drawing on Genesis 17 and related Old Testament texts, it argues that circumcision served as an everlasting covenant token, both physical and spiritual: a sign and seal of righteousness received by faith, administered to households, yet not the efficient cause of saving grace. New Testament texts, especially Colossians 2:11–12, Romans 4:11–12, and the household baptisms in Acts, present baptism as the corresponding New Covenant sign. The Hebrew term “ʿôlām’ (“everlasting”) admits both permanence and change of form across redemptive-historical epochs. Consequently, circumcision does not disappear but is transformed; its substance, union with God in the covenant of grace, is now administered in baptism and extended to both male and female. The article concludes that the two rites are sacramentally identical in spiritual reality, though distinct in outward form, a conclusion consistent with the Westminster Confession of Faith, chapter 27.

Introduction

Reformed theology has long treated the covenant as the principal interpretive grid for Scripture. God binds himself to humanity by promise and stipulation and marks that relationship with visible signs. In the Abrahamic covenant, the appointed sign is circumcision (Gen. 17:9–14). In the New Covenant, the appointed sign is baptism. The present study contends that these two rites stand in an organic, not merely analogical, relationship. Circumcision is not abolished; it is fulfilled and recast. The argument first establishes the characteristics of circumcision, then those of baptism, and finally resolves the apparent tension created by the “everlasting” character of the earlier ordinance.

The Covenant Framework

Francis Turretin defined a covenant as “the agreement of God with man by which God promises his goods (and especially eternal life to him), and by man, in turn, duty and worship are engaged.” The arrangement is bilateral: divine promise meets human stipulation. Herman Witsius likewise described the covenant as “an agreement between God and man about the way of obtaining consummate happiness,” accompanied by a commination (a formal threat or denunciation of punishment, especially divine judgment or curse, pronounced against those who violate a covenant, commandment, or sacred obligation) against those who despise the offered blessing. Within this framework, the sign is neither optional nor merely ceremonial; it is the visible token of an everlasting relationship (Gen. 17:13).

Characteristics of Circumcision

Genesis 17:9–14 institutes circumcision as the covenant sign to be placed on every male, whether born in the household or acquired by purchase, on the eighth day. The uncircumcised male is “cut off” from the people for breaking the covenant. Two features stand out: the sign is administered to infants and dependents, and it is described as “everlasting.”

Subsequent texts reveal a spiritual dimension that cannot be reduced to the physical act. Deuteronomy 30:6 promises that “the LORD your God will circumcise your heart and the heart of your offspring.” Jeremiah 4:4 exhorts Judah to “circumcise yourselves to the LORD; remove the foreskin of your hearts.” Paul, interpreting Abraham’s circumcision, calls it “a sign \ldots a seal of the righteousness of the faith which he had while he was still uncircumcised” (Rom. 4:11). Abraham was already justified by faith; the rite sealed what faith had received. Colossians 2:13 likewise speaks of God quickening those who were “dead in \ldots the uncircumcision of [their] flesh,” confirming that the decisive action is divine and internal.

Matthew Poole’s comment on Colossians 2:13 brings together the relevant strands: the Gentiles needed no circumcision of the flesh because they already possessed, in Christ, both justification and sanctification. The “uncircumcision of the flesh” is both literal and metaphorical—an uncircumcised heart. God freely pardons on the basis of Christ’s satisfaction; the Spirit implants a living principle. The sacrament itself does not confer the grace it signifies.

The same texts that mandate the sign also show that possession of the sign does not guarantee the reality it signifies. Jeremiah 9:25 announces judgment upon “all who are circumcised merely in the flesh.” Esau, circumcised according to the commandment, “despised his birthright” (Gen. 25:34); Paul cites the divine verdict, “Jacob I loved, but Esau I hated” (Rom. 9:13). The sign marks a community; it does not automatically impute righteousness.

Characteristics of Baptism

If circumcision is an everlasting covenant, what happens to it in the New Testament? Paul provides the hinge in Colossians 2:11–12: believers “were circumcised with a circumcision made without hands \ldots by the circumcision of Christ, having been buried with him in baptism.” The apostle does not treat the two rites as successive afterthoughts; he identifies the circumcision of Christ with the burial and resurrection enacted in baptism. Union with Christ is effected by the Spirit, not by the outward act of circumcision or baptism (1 Cor. 12:13; Titus 3:5; Gal. 3:27).

Baptism, like circumcision, is a once-for-all ordinance commanded by the Lord and administered to households (Acts 16:15, 33). Peter explicitly links the promise to “you and to your children” (Acts 2:39). The thief on the cross (Luke 23:42–43) shows that the sign is not indispensable to salvation; the reality it signifies, union with Christ, can precede the rite or even occur apart from it. Nevertheless, the rite remains the appointed means of identifying the covenant community.

Circumcision pointed forward to Christ’s cutting off, while baptism points backward to the same event. Because both signs seal the same righteousness received by faith, they are, in Paul’s teaching, virtually interchangeable in substance.

The Semantic Range of ʿÔlām and Redemptive-Historical Continuity

The Hebrew term “ʿôlām,” commonly rendered “everlasting” or “forever,” does not always denote unending duration without remainder. Context determines whether a practice persists in the same form or is transformed. Several Mosaic ordinances illustrate this point.

·         A servant whose ear is pierced “shall serve him forever” (Exod. 21:6), that is, for the remainder of his natural life.

·         The Feast of Unleavened Bread and the Passover are “everlasting” ordinances (Exod. 12:14, 17), yet the New Covenant church no longer observes them in their original form; they find fulfillment in Christ and in the Lord’s Supper.

·         The Sabbath is a “perpetual covenant” (Exod. 31:16–17), yet its day is transferred to the first day of the week in commemoration of the resurrection, while the principle of rest after labor remains (Heb. 4:9, “sabbatismos”).

Genesis 17:7–10 employs the same vocabulary for circumcision and for the land promise. The discontinuity is that physical circumcision is no longer required; the continuity is that baptism now functions as the covenant mark. The blessings of the sign are simultaneously expanded: “there is neither male nor female, for you are all one in Christ Jesus” (Gal. 3:28).

Thus, the “everlasting” character of circumcision is preserved, not contradicted, when the sign changes form. The substance, participation in the covenant of grace, remains identical.

Sacramental Theology

The Westminster Confession of Faith, chapter 27, provides a concise dogmatic summary. Sacraments are “holy signs and seals of the covenant of grace, immediately instituted by God, to represent Christ and his benefits.” A sacramental union exists between the sign and the thing signified, so that the names and effects of one may be attributed to the other. Grace is not conferred by any power in the elements themselves, nor does efficacy depend on the administrator’s piety, but on the work of the Spirit and the word of institution. Only two sacraments are ordained by Christ in the gospel: baptism and the Lord’s Supper. Finally, “the sacraments of the Old Testament, in regard of the spiritual things thereby signified and exhibited, were, for substance, the same with those of the New.”

Circumcision and the Passover were types pointing to Christ; baptism and the Supper now exhibit the same realities, now fulfilled. The replacement of circumcision by baptism therefore marks the transition from the age of shadow to the age of substance, not the abolition of covenant signs.

Conclusion

Once the continuity and discontinuity of redemptive history are rightly distinguished, no dilemma remains between the everlasting command of circumcision and the New Testament practice of baptism. Circumcision changed form; its essence is now administered through baptism. The covenant community is still marked by a visible sign placed on believers and their households, yet the sign itself neither generates nor guarantees the righteousness it seals. That righteousness is God’s gift, received by faith and applied by the Spirit. In this sense, circumcision and baptism are inescapably connected: they are one sacrament in two historical administrations, both serving the same gracious covenant “coram Deo”.

Notes

1.      Francis Turretin, “Institutes of Elenctic Theology”, trans. G. M. Giger (Phillipsburg, NJ: P&R, 1992), 1:574 (Locus 8, Q. 3, §3).

2.      Herman Witsius, “The Economy of the Covenants Between God and Man”, vol. 1 (Grand Rapids: Reformation Heritage Books, 2010), 45.

3.      Matthew Poole, “Commentary on the Holy Bible”, vol. 3 (Peabody, MA: Hendrickson, 1982), 717–18.

Declaration

“For transparency, I note that I used Grok, an AI tool developed by xAI, and Grammarly AI for editorial assistance in drafting, organizing, and refining the manuscript’s clarity and grammar, as indicated in the article’s attribution. All theological arguments, exegesis, and interpretations are my own, and I take full responsibility for the content.” –  Jack Kettler

“For the weapons of our warfare are not carnal but mighty in God for pulling down strongholds, casting down arguments and every high thing that exalts itself against the knowledge of God, bringing every thought into captivity to the obedience of Christ.” (2 Corinthians 10:4-5)