Note: I originally penned this piece for my theological studies at Ridley College. It is a short, exegetical essay on Isaiah’s ultimate passage, Isa 66:18-24. I also don’t mind saying that I did pretty well on it! The essay certainly isn’t everyone’s cup of tea, but for the exegetically-minded, it may well provide some food for thought.
The book of Isaiah contains some of the loftiest language in all Scripture, its pages replete with remarkable visions of divine majesty. Isaiah 66:18-24 is no different: there, the prophet’s audience is treated to an eschatological vista, as the nations stream into a restored Jerusalem to worship the one, true God. The revelation of Yahweh’s glory, the universal reach of his salvation, the triumph over idolatry and false worship, and the final distribution of rewards and punishments – these and other Isaianic themes are dramatically drawn together in 66:18-24, which sets them within an ultimate frame of reference.
Such will form the backdrop for my examination of 66:18-24, as I argue that it provides a fitting coda to Isaiah. Indeed, its structurally significant position at the close of the Isaianic corpus is manifested in the multifarious connections it bears with the rest of the book. Depicting God’s universal revelation within a renewed creation, the passage reflects an eschatological longing that also resolves the book’s basic tension between judgment and salvation. Finally, I’ll briefly sketch some of the text’s important hermeneutical points, showing that whilst salvation is offered to all, persistent rebellion exacts a sure and terrible price.
Contextualizing Isaiah 66:18-24
Questions concerning the context of Isaiah 66:18-24 – both historical and literary – have yielded multiple positions. Scholars have made numerous, sometimes speculative, suggestions regarding the passage’s historical background, with many thinking it dimly reflects a post-exilic setting. Gardener, for example, argues the international convocation and dispersal of emissaries (vv.18-19) suggests just such a period, when Jerusalem was still populated by foreigners. Though not unreasonable, one should be cautious about reducing the elements of the passage to “mundane” occurrences. Trying to “establish an absolute dating” for the text is fraught with difficulties, given it lacks the expected historical anchors tying it to a particular period. Ultimately, 66:18-24 is “eschatologically oriented” – inviting the audience to cast its collective vision forward to an as-yet unrealized era of creational and corporate renewal. Not that the passage is completely severed from the general historical process (e.g., 66:20; cf. 64:10-11; 65:18-19); however, it does suggest a period that exceeds the limits of purely historical or temporized events.
The literary context of Isaiah 66:18-24 can be discerned with greater confidence, for it bears multiple, overlapping links with the surrounding textual neighbourhood. Although the text constitutes a distinct unit, a clear connection exists between it and the preceding passage: a universal missionary effort succeeds universal judgment (vv.15-17), even as the consequences for the rebellious are severely felt (vv.16,24). Concluding ongoing tensions between Yahweh’s servants and the apostates (cf. 65:13-15), 66:18-24 envisions the finality of deliverance and reprobation – part of a broader relationship between Isaiah 65-66. Moving further afield, 66:18-24 picks up several prophetic threads in Trito-Isaiah, (e.g., the interchange between judgment and salvation, the inclusion of Gentiles into the redeemed community [56:1-8; cf. 66:18-21]). Indeed, commentators have noted numerous verbal links between the prophet’s final vision and the rest of Trito-Isaiah – particularly 56:1-8, with which 66:18-24 constitutes an inclusio around the book’s last major division. Finally, the text constitutes a counterpoint to the opening indictment of Isaiah 1 in another inclusio, framing the book with contrasting pictures of false and true worship. I shall explore these points further as I proceed.
Exegeting Isaiah 66:18-24
Isaiah 66:18-24 can be divided further into two sub-sections: vv.18-21, in which Yahweh draws together people from all nations, Jew and Gentile; and the resulting convocation of vv.22ff, where the pilgrims engage in ceaseless worship of the one, true God.
Much of the passage is rather elliptical, making interpretation difficult. Those challenges begin with v.18, which apparently details God’s response to the iniquity of the irreligious. We may draw some tentative conclusions, however. The most likely antecedent of “they” (v.18a) are the rebellious of vv.16b-17, who exposed their obstinacy through corrupt and idolatrous worship (cf. 57:12; 59:6-7; 65:2). Their iniquitous actions somehow “trigger” Yahweh’s decision to call people from the nations – i.e, a foil for his determination to unveil his glory (v.19). Verse 18b is the first of several references that give 66:18-24 a decidedly universalistic hue, thus taking up themes broached earlier in Trito-Isaiah (e.g., 56:1-8) and Isaiah 40-55 (45:22-25). The consequent international assembly will “see” God’s “glory” (thrice-underscored in vv.18-19; cf. 42:8), which in context could refer to the revelation of his unique splendour, associated with his status as the world’s only Lord.
In concert with this great ingathering, Yahweh will establish a “sign” among “them” (v.19a). Some argue that where v.18 summarises God’s plan in this passage, vv.19-21 detail its unfurling. However, the construction of v.19 suggests a sequential relationship with the previous verse (otherwise, “them” in v.19a lacks context). Identifying the sign has also generated debate, given its ambiguity (cf. 11:10-11). A number of suggestions have been made: e.g., the restoration of Jerusalem (cf. 62:1-2,11-12), or the sending of the emissaries themselves (v.19b). The first option ties 66:18-24 to earlier portions of Trito-Isaiah, but lacks positive warrant from within the passage; the second alternative also seems unlikely, for the act of disseminating heralds appears to be distinct from the sign itself. It’s entirely possible the author has been deliberately non-specific, in keeping with the eschatological, visionary complexion of the passage.
“Survivors” will be sent to declare Yahweh’s glorious fame (v.19b). The term evokes images of people enduring a great catastrophe; some commentators reason that this reference ultimately finds inspiration in the experiences of post-exilic Jews. This cannot be ruled out, although like the rest of 66:18-24, v.19 lacks historical markers. Again, it’s perhaps best to interpret this clause in association with vv.15-17, where Yahweh poured out his fury upon “all flesh”. If vv.18-24 follows in sequence, then the “survivors” are probably those who underwent the universal execution of Yahweh’s judgment. A related issue is whether the survivors-cum-heralds are Jews or Gentiles. Some argue for the former position, given earlier references to survivors from the Judahite community (4:2). But the natural antecedent of “those who survive” are the members of the international gathering (v.18b) – i.e., non-Jews who endured the conflagration of vv.15-17 (cf. 45:20) – obviating the need to look beyond the passage’s literary environs to determine their identity. Of course, this raises the question: if the envoys are Gentiles, how should they be distinguished from those foreigners who have not heard of Yahweh’s “fame” (v.19b)? The most reasonable interpretive course is to argue that the distinction is based on proximity to Jerusalem. Those from Israel’s near-neighbours – who would themselves be adherents of Yahwism – will travel to the farthest reaches of the earth (cf. the impressionistic list of countries in v.19b) to announce Yahweh’s splendour.
Verse 20 sees those from the far-flung nations convey “[your] brothers” to the holy mountain in a restored Jerusalem (see 64:10-11; 65:18-19; cf. 1:26-27; 36:1-37:37). This image shouldn’t be taken too literally – as if so many millions could fit into such a small parcel of land – and is more intelligible on a visionary interpretation. Jerusalem’s presence here coheres with the Isaianic commitment to the city as the centre from which Yahweh’s glory will be revealed. Similarly, “holy mountain” features in other texts envisioning eschatological renewal (2:2-4; 65:25c; cf. 56:7). Its present inclusion offers an implicit contrast with 65:11, which has the disobedient abandoning God’s sacred mountain. Here, however, his servants venture towards it. Some argue that “your brothers” are ingrafted Yahweh-fearers from among the Gentiles. But v.20 seems to distinguish between this group, and those who ferry them. If indeed both cohorts are composed of non-Jews, we may ask what differentiates them – i.e., why only one group is explicitly said to enjoy fraternal standing with God’s covenant people (“your”). Conversely, understanding the term as referring to Jews comports with passages alluding to the hope that Abraham’s scattered descendants will be re-gathered (11:11-12; 49:8-12).
Gentiles will therefore transport members of the diaspora on a variety of vehicles and domesticated animals – an image evoking urgency and alacrity, as this great multitude descends on Jerusalem. Their actions are compared with the “pure” offerings of Jews before Yahweh (v.20b), which suggests acceptable worship and thanksgiving. This represents a “striking reversal of” attitudes concerning “unclean” foreigners. Remarkably, these same Gentiles will even be elected to cultic office as priests and Levites (“some of them” – v.21). Although some exegetes contend that the verse refers to diaspora Jews, such a claim is unlikely: to say that would hardly be remarkable, and indeed, rather anti-climactic. Verse 21 not only corresponds to, but also “escalates”, the vision of 56:1-8, where foreigners were permitted to enter the sanctuary. Further emphasising the text’s universalism, 66:21 affirms the role of Gentiles as ministers and facilitators of pure worship in the New Jerusalem, further dismantling distinctions between Jew and non-Jew in the redeemed community (cf. 56:8).
Verses 22-23 unveil the final goal of this multi-national congress: worship of Yahweh as the world’s true sovereign, set within a renewed creation. Together with vv.18-21, these verses counterpose the perversity of religious formalism in the physical Jerusalem (Isa 1:1ff) – part of that wider inclusio at work in Isaiah – by envisioning true worship in a New Jerusalem. They also constitute a capstone to the book’s polemic against idolatry, supplanting false worship with global recognition of Yahweh (“all flesh”; cf. Isa 40-48 and Yahweh’s cosmic “lawsuit” against idols). The term, “New heavens and new earth” corresponds closely to 65:17-25; although some contend that it’s merely a poetic description of the new order or restored city (65:17ff), the language evokes the totality of creation (Gen 1:1). In addition, the verb “make” may well correspond to the thought behind a text like Genesis 2:4, whilst 65:17-25 contains its own references (long life, the fruitfulness of toil and child-bearing) which represent an undoing of the primordial curse (cf. Gen 3:15-19). The new creation’s endurance – free from death and despoliation – is analogous to the persistence of Yahweh’s servants, who will enjoy permanence of posterity (cf. 56:5). This may ultimately reflect the incipient universalism in Abraham’s originating call (“seed”; cf. Gen 12:1-3).
Jewish and Gentile pilgrims will engage in purified worship of the one, true God (v.23b: “…bow down before me…”). The clause, “From one New Moon…” implies that it will also be perpetual (v.23a). We may discern another contrastive link – anchored in the dual references to Sabbaths and New Moon festivals – between this uncorrupted activity and the religious formalism within the Judahite community (1:13ff). The faithful worshipers are, of course, sharply distinguished from the corpses of the rebellious, which lie outside the city walls (v.24). The Isaianic interchange of salvation and judgment thus reaches a climax in the final consignment of the obedient and the obstinate. Yahweh’s servants will exit Jerusalem to “observe the grim fate” of those who stubbornly persisted in their rebellion. Verse 24 implies that the corpses are exposed (hence, the worshipers being able to view them). Their lack of proper burial is a fitting testimony to their own shamefulness: indeed, such a state represented the ultimate indignity for a Jew. The makeshift graveyard may have been inspired by the Hinnom Valley, located just south of Jerusalem; as a place of child sacrifice in OT times, it would have supplied a suitably gruesome image for the appalling destiny of the wicked. That the author speaks of “their worm” and “their fire” only serves to underscore the responsibility the unrighteous have for their own judgment, which here continues into the eschaton. Less clear is whether this can be taken as a picture of conscious, post-mortem anguish (as per later depictions of Hell). The punishment seems permanent, but the clear reference to “dead bodies” indicates literal death. Meanwhile, “worm” and “fire” signal the permanent state of dissolution and judgment, respectively (cf. 1:31) – a terrible fate, and a sobering reminder of rebellion’s consequences.
Isaiah 66:18-24 concludes the overarching trajectory of the book, weaving many of its themes together in a most astounding eschatological vision. It remains now to uncover some of the passage’s primary hermeneutical implications. The passage’s deep-rooted universalism immediately springs to mind, which is of a piece with the NT’s insistence that the message of salvation through Christ is, in principle, for all (John 12:32). God’s children are so, not because of ethnic lineage, but because they are born of him (John 1:13; Acts 8:26-38). A narrow, ethno-centric cast of mind may have been scandalized by such texts. But the church is also guilty of trying to restrict the gospel’s reach, often on the basis of cultural and social mores masquerading as the fundamentals of orthodoxy. Isaiah 66:18-24 reminds us that the gospel stands as God’s promise to welcome “[every]one who fears him and does what is right” (Acts 10:34). The passage confirms what much of Isaiah has already indicated – namely, that the primary metric of membership within the covenant community is not ethnicity (or any external trait), but humility before his word (Isa 66:2). Of course, this is not the whole word, for the offer of salvation does not remain open in perpetuity; judgment is still a reality. Isaiah 66:18-24 strongly implies that actions have moral consequences, even beyond this present life. Apart from humble adoration before Yahweh, one can only expect wrath and loss. Difficult though it may be, this, too, cannot be ignored.
 See the summative statement concerning Isa 66:18-24 in Joel S. Kaminsky and Anne Stewart, “God of All the World: Universalism and Developing Monotheism in Isaiah 40-66”, HTR 99 (2006): 160. Cf. Brevard Childs, Isaiah (OTL; Louisville: Westminster John Knox Press, 2001), 542: “A succinct summary of the eschatological themes that occur throughout the entire book…”
 Andrew T. Abernethy, The Book of Isaiah and God’s Kingdom: A Thematic-Theological Approach (NSBT 40; Downers Grove: Inter-Varsity Press, 2016), 193.
 See R. Reed Lessing, Concordia Commentary: Isaiah 56-66 (CC; St. Louis: Concordia Publishing House, 2014), 29-30, for a brief survey of the various hypotheses that have been put forward. Lessing’s conclusion – that in many cases, such reconstructions illegitimately attempt to historicise what appears to be an eschatological text – is a wise one.
 See Michael J. Chan, “Isaiah 56-66 and the Genesis of Re-orienting Speech”, CBQ 72 (2010): 449-450, who says that some scholars date the pericope to the Persian period, subsequent to the building of the Second Temple. Chan acknowledges that the material in this entire section “eludes precision of dating or exactitude of allusion” (451).
 Anne E. Gardner, “The Nature of the New Heavens and the New Earth in Isaiah 66:22”, ABR 50 (2002): 15, n.18. This isn’t to disparage the view that certain elements in Isa 66:18-24 may have been inspired by historical events – merely to suggest that such occurrences do not exhaust the significance of the pericope.
 E.g., Childs, Isaiah, 444.
 Gary V. Smith, Isaiah 40-66 (NAC; Nasville: B&H Publishing, 2009), 65, 69, 519.
 William J. Dumbrell, “The Purpose of the Book of Isaiah”, TynB 36 (1985): 128.
 Pace Joseph Blenkinsopp, Isaiah 56-66: A New Translation with Introduction and Commentary (AB 19B; New York: Doubleday, 2003), 312, who argues there is no relationship between these passages whatsoever. Cf. Lessing, Isaiah 56-66, 492.
 Smith (Isaiah 40-66, 521) argues that Isa 66:18-24 is part of a larger literary unit stretching back to 63:7. This is true, although it should also be noted that whilst 63:7-64:13 are a lament in the face of corruption and devastation, chapters 65-66 seem to constitute Yahweh’s response.
 I am using the term “Trito-Isaiah” in a purely heuristic sense.
 John N. Oswalt, “Judgment and Hope: The Full-orbed Gospel”, TrinJ 17 (1996): 197.
 See Edwin C. Webster, “A Rhetorical Study of Isaiah 66”, JSOT 11 (1986): 103.
 Blenkinsopp, Isaiah 56-66, 38.
 Alec Motyer, The Prophecy of Isaiah (Leicester: Inter-Varsity Press, 1993), 541; John Goldingay, Isaiah 56-66: A Critical and Exegetical Commentary (ICC; London: Bloomsbury, 2014), 512.
 See Motyer, The Prophecy, 541. Conrad argues that the identity of those referred to in v.18 is especially hard to uncover if, as some maintain, the verse is unrelated to what precedes it. See Edgard W. Conrad, Reading Isaiah (OBT; Minneapolis: Fortress Press, 1991), 92.
 Goldingay, Isaiah 56-66, 512. References to deeds and actions in those passages are all cast in a negative light.
 Oswalt, Isaiah – Chapters 40-66 (Grand Rapids: Eerdmans, 1998), 687. Cf. Goldingay, Isaiah 56-66, 512.
 Goldingay, Isaiah 56-66, 513.
 Goldingay, Isaiah 56-66, 513. Whybray reasons that the reference to glory has a “restrictive and intensive sense” associated with the temple (cf. Ezek 11:22-23). See R.N. Whybray, Isaiah 40-66 (NCBC; Grand Rapids: Eerdmans, 1975), 289. Abernethy plausibly suggests that Yahweh’s glory should be seen in conjunction with the restoration of Zion (Isa 60). See Abernethy, The Book, 193-194.
 Jan L. Koole, Isaiah III: 56-66 (HCOT; Leuven: Peeters, 2001), 522.
 Claus Westermann, Isaiah 40-66: A Commentary (OTL; London: SCM Press, 1976), 425.
 Oswalt, Isaiah, 687. Whybray, Isaiah 40-66, 290.
 Whybray, Isaiah 40-66, 290.
 E.g., Oswalt, Isaiah, 688-689, who argues there is nothing explicit in this passage about Gentiles experiencing judgment (but see 66:16 and “all flesh”). Moreover, the textual links between vv.15-17 and vv.18-19 favour the position I take. Cf. Goldingay, Isaiah 56-66, 514.
 John D.W. Watts, Isaiah 34-66 – Revised (WBC 25; Waco: Thomas Nelson, 2005), 940. Cf. Emmanuel Uchenna Dim, The Eschatological Implications of Isaiah 65 and 66 as the Conclusion to the Book of Isaiah (Bern: Peter Lang, 2005), 176, 182. Cf. Willem A.M. Beuken, “Yhwh’s Sovereign Rule and His Adoration on Mount Zion: A Comparison of Poetic Visions in Isaiah 24-27, 52, and 66”, in The Desert Will Bloom: Poetic Visions in Isaiah, eds. Joseph A. Everson and Hyun Chul Paul Kim (Atlanta: Society of Biblical Literature, 2009), 105.
 Whybray Isaiah 40-66, 290; cf. Blenkinsopp, Isaiah 56-66, 314.
 Blenkinsopp, Isaiah 56-66, 314; cf. Koole, Isaiah III, 520; Dim, The Eschatological, 183.
 Dim, The Eschatological, 187. See also Shalom M. Paul, Isaiah 40-66: Translation and Commentary (ECC; Grand Rapids: Eerdmans, 2012), 626, 628.
 Oswalt, Isaiah, 692.
 Blenkinsopp, Isaiah 56-66, 314.
 Dim, The Eschatological, 186-187.
 E.g., Motyer, The Prophecy, 542, who partly bases his argument on the assumption that “your brothers” and those being made priests and Levites (v.21) should be identified.
 Goldingay, Isaiah 56-66, 516.
 See Paul, Isaiah 40-66, 628-629 for comparable practices of tribute levied before potentates in Mesopotamia.
 Whybray, Isaiah 40-66, 291.
 E.g., Jose Severino Croatto, “The ‘Nations’ in the Salvific Oracles of Isaiah”, VT 55 (2005): 157. Croatto also claims that the nations in 66:18-24 play a purely servile role (hence, his interpretation of v.21). This seems clearly to run against the grain of the text.
 Blenkinsopp, “Second Isaiah – Prophet of Universalism”, JSOT 13 (1998): 103, n.51; Oswalt, The Holy One of Israel: Studies in the Book of Isaiah (London: James Clarke & Co., 2014), 104.
 See Goldingay, Isaiah 56-66, 520, who refers to a “suggestive sequence” of expansion in Isa 56-66, climaxing with the “globalization” of the priesthood in 66:21.
 Westermann, Isaiah 40-66, 426. See, too, Mark T. Long, “The Inclusion of the Nations in Isaiah 40-66”, TE 44 (1991): 91; Gary Stansell, “The Nations’ Journey to Zion: Pilgrimage and Tribute as Metaphor in the Book of Isaiah”, in The Desert Will Bloom: Poetic Visions in Isaiah, eds. Joseph A. Everson and Hyun Chul Paul Kim (Atlanta: Society of Biblical Literature, 2009), 246.
 Dumbrell, “The Purpose”, 128; Motyer, The Prophecy, 543; cf. Dim, The Eschatological, 183.
 On the universal implications of “all flesh”, see Goldingay, Isaiah 56-66, 521. Cf. Childs, Isaiah, 542; Paul, Isaiah 40-66, 632; Koole, Isaiah III, 528; Kaminsky and Stewart, “God of All the World”, 160-161; Gardner, “The Nature”, 15, 26.
 Koole, Isaiah III, 526; Oswalt, Isaiah 40-66, 691.
 E.g., Goldingay, Isaiah 56-66, 527. Calvin argues that the reference to a renewed heavens and earth refers to the “inward renewal of man”. This represents an unwarranted spiritualisation of the text. See John Calvin, Commentary on the Prophet Isaiah – 33-66 (trans. William Pringle; Grand Rapids: Baker Books, 2009), 437.
 Koole, Isaiah III, 526.
 Childs, Isaiah, 542; Dim, The Eschatological, 193.
 Motyer, The Prophecy, 543. See Gardner, “The Nature”, 26, and Isaianic references there to “seed” as a reference to the descendants of the patriarchs.
 Goldingay, Isaiah 56-66, 521.
 Calvin, Commentary, 437.
 Motyer, The Prophecy, 543; Dim, The Eschatological, 195; Koole, Isaiah III, 528.
 Lessing, Isaiah 56-66, 29.
 Dim, The Eschatological, 197.
 Oswalt, Isaiah 40-66, 692.
 Childs, Isaiah, 542.
 Calvin, Commentary, 439, correctly judges “fire” to be a metaphor for judgment. Whether “worm” symbolizes a troubled conscience, as he contends, is less certain. For the connections between v.24 and Isa 1:29-31, see Smith, Isaiah 40-66, 744; cf. Oswalt, The Holy One, 70, n.41.
 Goldingay, Isaiah 56-66, 524; Calvin, Commentary, 440; See also Paul D. Hanson, Isaiah 40-66 (Int; Louisville: John Knox Press, 1995), 252. I regard Goldingay’s contention that the passage has nothing to do with individual eschatology (or cosmic eschatology) as somewhat reductive.
 Stansell, “The Nations’ Journey”, 244.
 Goldingay, Isaiah 56-66, 525.