Isaiah 48:12–13

In these two verses, the LORD interrupts His own indictment of Israel's stubbornness with a fresh, urgent summons — "Listen to me, O Jacob" — grounding His authority to command not in past salvific deeds alone, but in His identity as the Creator who founded the very earth and stretched out the heavens. The passage moves from intimate personal address (naming Jacob/Israel) to cosmic declaration, yoking the covenant relationship with Israel to the universal act of creation. Together, these verses insist that the God who calls Israel is no tribal deity but the Lord of all existence.

Verse 12 — "Listen to me, O Jacob / and Israel, whom I have called"

The imperative "listen" (Hebrew shema', שְׁמַע) is one of the most charged words in the Hebrew Bible. It echoes the great Shema of Deuteronomy 6:4 and recalls the covenantal logic that Israel's entire identity is constituted by attentive response to the divine voice. Here in the larger context of Isaiah 40–55 (the so-called "Book of Consolation"), God has been challenging Israel for its idolatry and spiritual deafness (cf. Isa 48:1–8). The pivot in verse 12 is dramatic: instead of continuing the accusation, God addresses Israel by both patriarchal names — "Jacob" (the given, earthly name) and "Israel" (the name received at Peniel, connoting vocation and struggle). This dual address is not redundant; it holds together the natural, fallen reality of the people (Jacob the deceiver) with their graced identity (Israel, the one who wrestles with God). The phrase "whom I have called" (Hebrew qerā'tîkā, קְרָאתִיךָ) is particularly significant. In Isaiah, God's "call" is the creative-redemptive word that brings something into existence and purpose. Israel did not achieve its status; it was summoned into being. This calling precedes and grounds all of Israel's history and failures. The word "I am he" (ʾănî hûʾ, אֲנִי הוּא) — rendered variously as "I am He" or simply "I, I am" — is a divine self-identification formula unique to Deutero-Isaiah (cf. Isa 41:4; 43:10, 13; 46:4). It asserts absolute, unqualified divine being: the LORD alone is the self-subsistent "I AM," a formula that will later resonate powerfully in the "ego eimi" sayings of John's Gospel. "I am the first, and I am the last" is a merism (first…last) that asserts God's governance over all of time and history — nothing precedes Him, nothing follows beyond Him. He is the Alpha and Omega before those Greek terms are coined.

Verse 13 — "Yes, my hand has laid the foundation of the earth / and my right hand has spread out the heavens"

The authority behind the summons in verse 12 is now disclosed: God speaks with the authority of the Creator. The image of God's "hand" laying the foundation of the earth is anthropomorphic but deliberately so — it personalizes and intensifies the act of creation. This is not impersonal cosmic force but the deliberate act of a personal Agent who shapes, places, and sustains. "Foundation of the earth" evokes the ancient cosmological image of creation as the construction of a stable edifice upon primordial chaos (cf. Ps 104:5; Job 38:4). The "right hand" spreading out the heavens continues this architectural metaphor: the heavens are like a vast tent or curtain (cf. Isa 40:22) unfurled by a sovereign craftsman. The final phrase — "When I call to them, they stand forth together" — is the theological crown of the verse. The cosmos is not autonomous; it is obedient. The stars, the seas, the vaulted sky respond instantly to the divine word. This simultaneous cosmic obedience ("together," , יַחְדָּו) forms a stunning contrast with Israel's chronic disobedience catalogued earlier in Isaiah 48. The very creation that serves as backdrop to Israel's history is more responsive to its Maker than the covenant people themselves. In the typological sense, the "hand" and "right hand" of God point toward the Son, the Logos, through whom "all things were made" (John 1:3). The Fathers consistently read the divine "hand" of the Old Testament as a pre-figuration of the Word incarnate.

Catholic tradition brings extraordinary depth to these two verses precisely because of its integrated vision of creation and covenant, developed most fully in the Catechism and the Church Fathers.

Creation as the First Word of Covenant. The Catechism teaches that "creation is the foundation of all God's saving plans" (CCC 280). Isaiah 48:13 is a vivid illustration: God appeals to His act of creation as the basis for His covenantal authority. This is not a detour into cosmology; it is a covenant argument. The God who calls Israel is the same God whose hands shaped heaven and earth — His fidelity to Israel is as reliable as the universe itself. This is what the Catechism elsewhere calls the "language of creation" by which God communicates with humanity (CCC 2500).

"I am He" and the Divine Name. The self-identification formula ʾănî hûʾ was recognized by the Fathers as a disclosure of the divine essence. St. Augustine, in De Trinitate, connects the LORD's self-identification in Isaiah with the revelation of the Name in Exodus 3:14, reading both as intimations of God's absolute, self-subsistent Being — what scholastic theology would later call aseitas (divine aseity). The First Vatican Council's Dei Filius (1870) explicitly teaches that God is "one, singular, completely simple and unchangeable spiritual substance," a truth Isaiah 48:12 anticipates.

The Creative Word and the Son. The Church Fathers, especially St. Irenaeus (Adversus Haereses IV, 20) and St. Athanasius (De Incarnatione 1), read the "hand" and "right hand" of God in creation texts as referring to the Son and the Holy Spirit — the two "hands of the Father" through whom all creation was made. This Christological reading is not allegory imposed from outside; it is drawn from the New Testament's own exegesis (Col 1:16; Heb 1:10, where Ps 102:25 — a parallel creation text — is applied directly to Christ).

The Call that Precedes Merit. The phrase "whom I have called" anticipates St. Paul's theology of prevenient grace: "It does not depend on man's will or exertion, but on God who shows mercy" (Rom 9:16). The Council of Trent (Session VI, Decree on Justification, ch. 5) teaches that the beginning of justification in adults comes from God's prevenient grace — a reality Isaiah 48:12 enacts narratively.

For the contemporary Catholic, the opening imperative of verse 12 — "Listen to me" — cuts directly against the most characteristic spiritual failure of our age: distraction. We are saturated by noise, notifications, and competing voices that all claim our attention. God addresses us, as He addressed Israel, by name — not as an anonymous mass of believers but as individuals He has personally called. The practice of lectio divina, commended by Benedict XVI in Verbum Domini (§86), is the structured, ecclesial response to precisely this divine summons: learning to listen to the voice that laid the foundations of the earth.

Verse 13 offers a remedy for anxiety. When our circumstances feel unstable — financial, relational, cultural — we are called to remember that the hands sustaining the cosmos are the same hands that hold our lives. The God who stretched the heavens at a word has not lost authority over our particular moment of history. This is not passive fatalism but grounded trust: the Creator is also the Caller, and His summons to us is backed by the full weight of His creative power. Practically, Catholics might pray verse 13 before Morning Prayer as an act of radical re-orientation — placing their day within the frame of the God who is first, last, and Maker of all.