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Old Testament Practices in New Covenant Context

The relationship between Old Testament practices and the New Covenant turns on the biblical concept of covenant succession. The Hebrew term berith originally referred to "a cutting," describing the ancient ritual of dividing animals and passing between the parts to ratify an agreement [3]. When Jeremiah prophesied a "new covenant" (Jeremiah 31:31), he set in motion a theological framework that would fundamentally reorient Israel's relationship to the Mosaic law.

The Obsolescence of the First Covenant

Hebrews 8:13 states plainly: "In that he says, 'A new covenant', he has made the first old. But that which is becoming old and grows aged is near to vanishing away" [2]. The author of Hebrews argues that from the moment God spoke of a new covenant through Jeremiah, the first covenant began its decline toward complete abolition [9]. This is not merely a matter of supplementation or improvement; the two covenants cannot coexist as parallel systems [9]. The Greek term diathēkē, often translated "testament" in older English versions, more properly means "covenant" and appears throughout the New Testament to describe this transition [4].

The first covenant, established at Sinai, was "not faultless" — not because God erred, but because it could not solve human weakness [7]. The Mosaic system provided no ultimate remedy for sin, only temporary coverings through repeated sacrifices. The new covenant, by contrast, rests on Christ's death, which provides both forgiveness for sins inadequately addressed under the old system and an eternal inheritance for those called by God [10].

Continuity and Discontinuity

The transition from old to new does not represent absolute rupture. The new covenant is called "new" because it succeeds the "old broken covenant of works," yet it remains "the covenant of grace," now "dispensed in a more clear, spiritual, extensive, and powerful manner than of old" [1]. This language of succession rather than contradiction reflects the biblical pattern: God's redemptive purposes remain constant, but the administrative framework changes.

Peter applies Old Testament descriptions of Israel — "a chosen generation, a royal priesthood, a holy nation" (Exodus 19:5-6) — directly to his predominantly Gentile Christian audience, indicating that believers in Christ constitute God's people in the new covenant era [11]. This transfer of covenant identity does not nullify the Old Testament; rather, it fulfills and extends its promises beyond ethnic Israel to all who are called.

The Status of Mosaic Legislation

The practical question concerns which Old Testament practices remain binding. The New Testament writers distinguish between moral principles embedded in creation and ceremonial regulations specific to Israel's covenant administration. Almsgiving, for instance, finds no explicit command in the Old Testament law codes, yet the Mosaic legislation (Leviticus 25:35; Deuteronomy 15:7) cultivated a spirit of charity that prevented destitution [6]. The principle of caring for the poor transcends covenant boundaries, while the specific mechanisms (gleaning laws, sabbatical years) belonged to Israel's theocratic order.

Jesus himself addressed the relationship between old and new in his parable about patching garments. He warned against putting "a piece of a new garment upon an old," suggesting that attempts to combine new covenant realities with old covenant forms produce incoherent results [12]. The image captures the futility of mixing covenant systems — trying to supplement the righteousness of Christ with Mosaic ceremonial observance, or attempting to maintain temple rituals alongside the once-for-all sacrifice of Calvary.

Hermeneutical Implications

The New Testament's use of the Old Testament reflects this covenant transition. Quotations are numerous but follow no uniform method, partly because the Old Testament was not yet divided into chapters and verses when the New Testament was written [5]. Luke refers to Exodus 3:6 as "Moses at the bush," and Paul cites 1 Kings 17-19 as "in Elias" — references to sections rather than verse numbers [5]. This citational practice reveals how the apostles read the Old Testament christologically, finding in its narratives and prophecies patterns fulfilled in Christ.

The day Jeremiah prophesied arrived when Jesus accomplished his redemptive mission, establishing the new covenant in his blood (Luke 22:20) [8]. From that point forward, the ceremonial and civil legislation of Israel ceased to function as covenant obligations for God's people. The moral law, reflecting God's unchanging character, remains authoritative, but its fulfillment now comes through union with Christ rather than through national Israel's theocratic structures.

Practical Boundaries

Christians are not bound to observe Sabbath regulations as Israel observed them, to maintain dietary restrictions, to offer animal sacrifices, or to make pilgrimages to Jerusalem. These practices belonged to the "shadow" that has given way to the "substance" in Christ. Yet the Old Testament remains Christian Scripture, profitable for teaching, reproof, correction, and training in righteousness. Its narratives reveal God's character, its wisdom literature instructs in godliness, and its prophecies testify to Christ.

The transition from old to new covenant does not render the Old Testament obsolete as revelation; it relocates its authority. What was once direct command for Israel becomes instructive precedent for the church. The Mosaic law no longer governs Christians as a legal code, but it continues to inform Christian ethics, worship, and theology as the inspired record of God's dealings with his people before Christ's coming. The covenant has changed; the God who makes covenants has not.

Sources

  1. Easton's Bible Dictionary “Easton's Bible Dictionary: New Testament — (Luke 22:20), rather "New Covenant," in contrast to the old covenant of works, which is superseded. "The covenant of grace is called new; it succeeds to the old broken covenant of works. It is ever fresh, flourishing, and excellent; and under the gospel it is dispensed in a more clear, spiritual, extensive, and powerful manner than of old" (Brown of Haddington). Hence is derived the name given to the latter portion of the Bible. (See [438]TESTAMENT.)”
  2. Hebrews “In that he says, “A new covenant”, he has made the first old. But that which is becoming old and grows aged is near to vanishing away. -- Hebrews 8:13”
  3. Smith's Bible Dictionary “Smith's Bible Dictionary: Covenant — The Heb. berith means primarily "a cutting," with reference to the custom of cutting or dividing animals in two and passing between the parts in ratifying a covenant. (Genesis 15; Jeremiah 34:18,19) In the New Testament the corresponding word is diathece (diatheke), which is frequently translated testament in the Authorized Version. In its biblical meaning two parties the word is used-- + Of a covenant between God and man; e.g. God covenanted with Noah, after the flood, that a like judgment should not be repeated. It is not precisely like a covenant between”
  4. Easton's Bible Dictionary “Easton's Bible Dictionary: Testament — Occurs twelve times in the New Testament (Heb. 9:15, etc.) as the rendering of the Gr. diatheke, which is twenty times rendered "covenant" in the Authorized Version, and always so in the Revised Version. The Vulgate translates incorrectly by testamentum, whence the names "Old" and "New Testament," by which we now designate the two sections into which the Bible is divided. (See [629]BIBLE.)”
  5. Easton's Bible Dictionary “Easton's Bible Dictionary: Quotations — From the Old Testament in the New, which are very numerous, are not made according to any uniform method. When the New Testament was written, the Old was not divided, as it now is, into chapters and verses, and hence such peculiarities as these: When Luke (20:37) refers to Ex. 3:6, he quotes from "Moses at the bush", i.e., the section containing the record of Moses at the bush. So also Mark (2:26) refers to 1 Sam. 21:1-6, in the words, "in the days of Abiathar;" and Paul (Rom. 11:2) refers to 1 Kings ch. 17-19, in the words, "in Elias", i.e., in the port”
  6. Easton's Bible Dictionary “Easton's Bible Dictionary: Alms — Not found in the Old Testament, but repeatedly in the New. The Mosaic legislation (Lev. 25:35; Deut. 15:7) tended to promote a spirit of charity, and to prevent the occurrence of destitution among the people. Such passages as these, Ps. 41:1; 112:9; Prov. 14:31; Isa. 10:2; Amos 2:7; Jer. 5:28; Ezek. 22:29, would also naturally foster the same benevolent spirit. In the time of our Lord begging was common (Mark 10:46; Acts 3:2). The Pharisees were very ostentatious in their almsgivings (Matt. 6:2). The spirit by which the Christian ought to be actuated in this d”
  7. Hebrews (Protestant academic) “Tyndale House on Hebrews 8:7: 8:7-13 The author quotes Jer 31:31-34, an Old Testament prophecy concerning the new covenant that includes a number of striking promises. Establishing the superiority of the new covenant lays a foundation for the argument in Heb 9:1–10:18 that the Son’s offering under the new covenant was superior to the offerings of the old covenant. 8:7 The first covenant, made at Sinai, was not faultless. It was not the end of God’s plan, because it didn’t solve human weaknesses (see 7:11-28; 8:9).”
  8. Jeremiah (Protestant academic) “Tyndale House on Jeremiah 31:31: 31:31 The day of the new covenant was realized when Jesus Christ accomplished his redemptive mission on earth (see Heb 8:8-12).”
  9. Hebrews (Presbyterian) “Jamieson, Fausset & Brown on Hebrews 8:13: he--God. made . . . old--"hath (at the time of speaking the prophecy) antiquated the first covenant." From the time of God's mention of a NEW covenant (since God's words are all realities) the first covenant might be regarded as ever dwindling away, until its complete abolition on the actual introduction of the Gospel. Both covenants cannot exist side by side. Mark how verbal inspiration is proved in Paul's argument turning wholly on the one word "NEW" (covenant), occurring but once in the Old Testament. that which decayeth--Greek, "that which is ”
  10. Hebrews (Presbyterian) “Jamieson, Fausset & Brown on Hebrews 9:15: for this cause--Because of the all-cleansing power of His blood, this fits Him to be Mediator (Heb 8:6, ensuring to both parties, God and us, the ratification) of the new covenant, which secures both forgiveness for the sins not covered by the former imperfect covenant or testament, and also an eternal inheritance to the called. by means of death--rather, as Greek, "death having taken place." At the moment that His death took place, the necessary effect is, "the called receive the (fulfilment of the) promise" (so Luk 24:49 uses "promise"; Heb 6:15; ”
  11. 1 Peter (Protestant academic) “Tyndale House on 1 Peter 2:9: 2:9 Peter applies descriptions of the Israelites in the Old Testament (see, e.g., Exod 19:5-6) to his primarily Gentile audience, indicating that they—like all Christians—are truly God’s people in the new covenant era.”
  12. Luke (Baptist/Reformed) “John Gill on Luke 5:35: And he spake also a parable unto them,.... The Scribes and Pharisees; illustrating what he had just now said: no man putteth a piece of a new garment upon an old; by "a piece of a new garment" meaning the new and upstart notions and traditions of the elders, which were so in comparison of the law of Moses; and by the "old", the robe of their own righteousness, wrought out in obedience to the moral and ceremonial law: and Christ suggests, that to join these together, in order to patch up a garment of righteousness, to appear in before God, was equally as weak and ridic”
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