Passage

Isaiah 48.12-16

Book: Isaiah · NASB95

Verse

"Listen to Me, O Jacob, even Israel whom I called; I am He, I am the first, I am also the last. Surely My hand founded the earth, and My right hand spread out the heavens; when I call to them, they stand together. Assemble, all of you, and listen! Who among them has declared these things? The LORD loves him; he will carry out His good pleasure on Babylon, and His arm will be against the Chaldeans. I, even I, have spoken; indeed I have called him, I have brought him, and He will make his ways successful. Come near to Me, listen to this: from the first I have not spoken in secret, from the time it took place, I was there. And now the Lord GOD has sent Me, and His Spirit." (Isaiah 48:12-16, NASB95)

Immediate context (±2 verses)

"For the sake of My name I delay My wrath, and for My praise I restrain it for you, in order not to cut you off... For My own sake, for My own sake, I will act; for how can My name be profaned? And My glory I will not give to another." (Isaiah 48:9, 11, NASB95)

The verse cluster sits within the Deutero-Isaiah monotheistic-confrontation section (Isa 40-48), the great prophetic argument for YHWH's incomparability against the gods of Babylon (specifically Bel/Marduk and Nebo, named at Isa 46:1). The full Deutero-Isaiah arc moves from comfort (Isa 40), to monotheistic polemic (Isa 41-48), to the Servant Songs (Isa 42, 49, 50, 52-53), to redemptive promise (Isa 49-55). Isaiah 48 climaxes the polemical section before the transition to redemptive-emphasis. Verse 16 specifically, "the Lord GOD has sent Me, and His Spirit", has been read across Christian tradition as a foundational OT-Trinitarian-prefiguration text.

Setting

Speaker: YHWH directly (vv. 12-15) and an interpretively-disputed final speaker in v. 16b who says "the Lord GOD has sent Me, and His Spirit", see Theological Reading move 4 below for the Christological-prefiguration question.
Audience: "O Jacob, even Israel whom I called", the Hebrew exilic / post-exilic community in Babylon (or returning to Judah).
Location: Composed (per traditional dating) by Isaiah ben Amoz in 8th-c. BC Judah for predictive-future-application; per Wellhausen-source-critical "Deutero-Isaiah" hypothesis, composed by an anonymous prophet during the Babylonian exile c. 540s BC. The traditional-conservative position (Oswalt NICOT Isaiah; Motyer The Prophecy of Isaiah) defends Isaianic unity; the academic-critical mainstream divides Isaiah into 1-39 (Proto-Isaiah) + 40-55 (Deutero-Isaiah) + 56-66 (Trito-Isaiah). Either dating works for the verse's theological content.
Time period: Either 8th c. BC (traditional unity) or 6th c. BC (Deutero-Isaiah hypothesis), the late-pre-exilic / Babylonian-exile context is the relevant interpretive frame either way.

Theological reading

The verse cluster is a foundational OT proof-text for radical monotheism AND a contested-but-influential Trinitarian-prefiguration text. Four structural moves carry the weight:

1. "I am He, I am the first, I am also the last", radical monotheistic self-declaration

Hebrew: אֲנִי הוּא אֲנִי רִאשׁוֹן אַף אֲנִי אַחֲרוֹן, "I am He, I am first, also I am last."

The construction ʾănî hûʾ ("I am He") is the Deutero-Isaiah monotheistic self-naming formula, recurring across Isa 41:4; 43:10, 13, 25; 46:4; 48:12; 52:6. The formula functions as YHWH's uncontested-deity-self-identification, a divine ego-eimi-equivalent that asserts YHWH's incomparable supreme deity. The "first / last" pairing intensifies: YHWH is the absolute temporal-priority (before all things) AND temporal-finality (after all things). Nothing exists before or after YHWH; all reality is bracketed by His existence.

This verse is load-bearing for the OT-monotheism position against the academic-atheist OT Polytheism Objection argument that Israelite religion was developmental-from-polytheism. Deutero-Isaiah's monotheistic self-declarations are EXPLICIT, FORMAL, and REPEATED, far beyond what henotheistic-or-monolatrous frameworks accommodate. The text TEACHES monotheism systematically.

2. "My hand founded the earth, and My right hand spread out the heavens", creation-monotheism

Verse 13 grounds YHWH's deity in His sole-creation-of-the-cosmos. The construction yāḏî yāsdâ ʾereṣ wîmînî tippeḥâ šāmāyim, "My hand founded earth, and my right-hand spread heavens", uses creation-language to ground monotheism. There is no co-creator; no Marduk-defeating-Tiamat to establish the cosmos; no theogonic conflict. YHWH alone created. The cosmos's existence is the ground of YHWH's incomparability.

3. "From the first I have not spoken in secret, from the time it took place, I was there", divine-pre-temporal presence

Verse 16a continues YHWH's first-person discourse: from the beginning of time, YHWH has been openly speaking; He was THERE at every event from creation onward. This grounds prophetic-revelation: YHWH's prophets aren't speculating, they speak what YHWH has openly declared from the beginning. The construction directly engages the ANE-pagan-prophecy tradition (which lacked this directness) and asserts YHWH's distinctively-revelatory communicative-supremacy.

4. "And now the Lord GOD has sent Me, and His Spirit" (v. 16b), the Trinitarian-prefiguration question

The most contested exegetical question in the passage: WHO is the speaker of v. 16b?

The first-person discourse of vv. 12-16a is YHWH speaking
v. 16b shifts: "And now the Lord GOD has sent Me, and His Spirit", the speaker is NOW being SENT BY "the Lord GOD" + sent ALONG WITH "His Spirit."
This creates a triadic structure: (a) the One sending = the Lord GOD (YHWH the Father in Trinitarian reading); (b) the One sent = Me (the Spokesperson, traditionally read as the pre-incarnate Christ / Servant of YHWH); (c) the Spirit accompanying the sending.

Christian Trinitarian reading: this verse is one of the OT's clearest Trinitarian-prefiguration texts, three distinguishable subjects (Father / Son / Spirit) within YHWH's discourse. The patristic-medieval tradition consistently reads it this way (Athanasius, Cyril of Alexandria, Augustine). The reading is reinforced by the broader Christological context, the Servant-of-YHWH tradition that climaxes in Isa 53 is plausibly the same Speaker.

Jewish / non-Trinitarian reading: v. 16b's "Me" is the prophet (Isaiah, or the Deutero-Isaiah figure) speaking. The Lord GOD has sent the prophet + the prophet's Spirit-anointing. This reading is exegetically defensible but doesn't account as well for the abrupt-discourse-shift from YHWH-speaking-throughout-vv-12-16a to "the prophet now speaking" in v. 16b.

Conservative-Christian-evangelical reading (Edward J. Young Isaiah NICOT 1965; J. Alec Motyer The Prophecy of Isaiah 1993; John Oswalt NICOT Isaiah 1986/1998): the speaker is the Servant of YHWH, the divine-but-distinct Spokesperson who appears across the Servant Songs (Isa 42, 49, 50, 52-53). This Servant is sent by the Lord GOD + accompanied by His Spirit. The triadic structure prefigures the Trinity without being fully explicit; Trinitarian fullness emerges only in the NT, but the foundational categories are here.

Apologetic deployment: while not as explicit as NT Trinitarian texts (John 1:1, John 14:9, Matt 28:19), Isa 48:16b is one of the strongest OT proto-Trinitarian texts. Christian apologetics deploys it alongside Gen 1:26 ("let Us make"), Gen 11:7, Isa 6:8, and the Servant-of-YHWH tradition as cumulative OT preparation for the NT-explicit Trinity.

Patristic and Reformation reception

Justin Martyr (Dialogue with Trypho 56-62), extensive deployment of OT proto-Trinitarian texts (including Deutero-Isaiah passages) in dialogue with Jewish interlocutor; argues the OT contains plural-divine-Person language that Trinity-doctrine fulfills.
Athanasius (Contra Arianos II + III), deploys Isa 48:16b as evidence that the Son's mission is in the OT prophetic-anticipation; central anti-Arian text.
Augustine (De Trinitate 1.4 + 2 + 5-7), extensive treatment of OT Trinitarian-prefiguration; Isa 48:16b read as one of the OT-distinguishable-Persons texts.
Cyril of Alexandria (Comm. on Isaiah), explicit Trinitarian reading of Isa 48:16b within his anti-Nestorian framework; the divine Servant sent by the Father with the Spirit.
Aquinas (ST I q.32-33, divine Persons doctrine; q.36 on the Holy Spirit), Isa 48:16b cited as scriptural ground for the doctrine of distinguishable-but-united divine Persons.
Luther (Lectures on Isaiah + various commentaries), affirms the Trinitarian-prefiguration reading; the Servant is Christ-pre-incarnate.
Calvin (Comm. on Isaiah 48:16), careful Trinitarian reading: "This passage is one of the clearest and most striking testimonies to the divine Persons in the Old Testament." Reformed-standard reading.
Modern: Edward J. Young Isaiah NICOT (1965); J. Alec Motyer The Prophecy of Isaiah (1993); John Oswalt NICOT Isaiah (1986/1998); Brevard Childs Isaiah OTL (2001), extensive treatment of the Servant-of-YHWH tradition + Trinitarian-prefiguration question.

Key words (Hebrew)

I am He, אֲנִי הוּא / ʾănî hûʾ: "I am He", Deutero-Isaiah's monotheistic self-naming formula; recurring across Isa 41-52 (41:4; 43:10, 13, 25; 46:4; 48:12; 52:6). Functions as divine self-identification with implicit-supremacy assertion. LXX consistently renders as egō eimi, the same construction Jesus uses in His Johannine I-AM declarations (cf. John 8.57-58).
first / last, רִאשׁוֹן / ʾrišôn (H7223) "first, former, beginning"; אַחֲרוֹן / ʾaḥărôn (H314) "last, latter, future." The pairing names temporal-priority + temporal-finality of YHWH; nothing exists before or after Him. The same pairing appears at Isa 41:4; 44:6; cf. Rev 1:8, 17 ("I am the Alpha and the Omega... the first and the last") where Christ takes the same divine-self-identification.
founded, יָסַד / yāsad (H3245): "to found, lay foundation, establish." Used of YHWH's creating-the-earth (Job 38:4; Ps 78:69; Prov 3:19; Isa 51:13, 16; 54:11; Zech 12:1). The verb is exclusively divine-action in the cosmological context.
spread out, טָפַח / ṭāpaḥ (H2946 in this construction; pi'el form) "to spread out, extend." Used of YHWH's spreading-out-the-heavens (Job 38:5; Ps 104:2; Isa 40:22; 42:5; 44:24; 45:12; 51:13). The verb is exclusively divine-action in cosmological context.
His Spirit, רוּחוֹ / rûḥô: "His Spirit / His breath / His wind"; rûaḥ (H7307) is the standard Hebrew term for the divine Spirit. The 3ms-suffix form rûḥô identifies the Spirit as belonging to the Lord GOD (the v. 16b sender). Trinitarian framework: distinct Person of the Holy Spirit alongside the Father (sender) and Son (sent).

Cross-references

Isaiah 41.4, "who has performed and accomplished it... I, the LORD, am the first, and with the last. I am He", companion ʾănî hûʾ + first/last formula
Isaiah 43.10-11, "Before Me there was no God formed, and there will be none after Me. I, even I, am the LORD, and there is no savior besides Me", explicit-monotheistic-declaration anchor (live-cite scripture in OT Polytheism Objection Defeater)
Isaiah 44.6, "I am the first and I am the last, and there is no God besides Me", companion first/last + monotheistic-exclusivity
Genesis 1.26, "Let Us make man in Our image", OT proto-Trinitarian text; companion to Isa 48:16b in cumulative case
Revelation 1.8, 17, "I am the Alpha and the Omega... I am the first and the last", NT Christological appropriation of the divine first/last formula
Matthew 28.19, Trinitarian baptismal formula; NT-explicit Trinitarian text
John 14.16-17, "I will ask the Father, and He will give you another Helper... the Spirit", Father-sends-Son-with-Spirit NT pattern that mirrors Isa 48:16b