Is God the Greatest Conceivable Being? What Three Faiths Say

Jewish scripture doesn't frame God's greatness as a philosophical proposition so much as a lived, doxological reality — something praised rather than argued. Psalm 145:3 puts it plainly: God's greatness cannot be fathomed Psalms 145:3. That's not just poetic humility; it's a theological claim that human cognition has a ceiling, and God is above it.

The book of Job reinforces this. Elihu declares, "God is greater than we can know" Job 36:26, and the context matters — Job has been demanding explanations from God, and the answer is essentially that the frame of reference itself is inadequate. You can't measure the infinite with a finite ruler.

Psalm 77:14 pushes further into comparative theology: "what god is as great as God?" Psalms 77:14 — a rhetorical question that dismisses all rival conceptions of divinity. Medieval Jewish philosopher Maimonides (1138–1204 CE) systematized this in his Mishneh Torah and Guide for the Perplexed, arguing that God's attributes can only be understood negatively (via negativa) — we can say what God is not, but positive descriptions inevitably fall short of His actual nature. This aligns closely with the scriptural insistence that greatness, in God's case, exceeds conception entirely.

The implication for Jewish practice is significant: if God's greatness is unfathomable, then intellectual humility before Torah, reverence in prayer, and acknowledgment of human limitation aren't optional — they're the rational response to what the texts actually claim.

Christianity inherits the Hebrew scriptures' insistence on divine incomparable greatness and then — particularly in the Western scholastic tradition — turns it into one of philosophy's most debated arguments. Anselm of Canterbury (1033–1109 CE) formulated the ontological argument in his Proslogion, defining God as "that than which nothing greater can be conceived" (id quo maius cogitari non potest). His logic: if such a being existed only in the mind, a greater being — one that also exists in reality — could be conceived. Therefore, the greatest conceivable being must exist in reality. It's a move from concept to existence, and it's been contested ever since, most famously by Immanuel Kant (1724–1804) and defended by Alvin Plantinga (b. 1932) in modal form.

What does this imply theologically? If God is maximally great — possessing maximal power, knowledge, and goodness — then several things follow for Christian thought: God cannot be surpassed or supplemented, God's commands carry ultimate moral authority, and the incarnation (God entering human history in Christ) represents the greatest conceivable act of condescension and love. Thomas Aquinas (1225–1274 CE) in the Summa Theologica argued that God is ipsum esse subsistens — Being Itself — which means His greatness isn't a property He has but something He is.

The Psalms, shared with Judaism, anchor this in worship: "Great is GOD and much acclaimed; such greatness cannot be fathomed" Psalms 145:3. Christian theologians read this as consistent with the doctrine of divine simplicity — God's greatness, goodness, and existence are not separate attributes but one undivided reality. There's genuine disagreement here, though: open theists like Gregory Boyd (b. 1957) argue that maximal greatness is compatible with God genuinely not knowing future free choices, while classical theists insist omniscience is non-negotiable for the greatest conceivable being.

Islam's affirmation of God's supreme greatness is arguably the most structurally central of the three traditions — it's literally embedded in the call to prayer five times a day. Allahu Akbar doesn't mean "God is great" in a static sense; it means "God is greater" — greater than whatever you're currently thinking, doing, or valuing. It's a comparative without a stated second term, which is theologically deliberate.

The Quran is explicit: "To Him belongs whatever is in the heavens and whatever is in the earth, and He is the Most High, the Most Great" Quran 42:4. The Arabic al-'Alī al-'Aẓīm — the Most High, the Most Great — appears repeatedly, and Islamic theology treats these as among the 99 names of God (Asma' Allah al-Husna). Surah 45:37 adds: "And to Him belongs [all] grandeur within the heavens and the earth" Quran 45:37 — grandeur isn't just attributed to God, it belongs to Him, suggesting ownership rather than mere description.

Surah 30:27 makes a further claim: "To Him belongs the highest description [i.e., attribute] in the heavens and earth" Quran 30:27. Classical scholars like al-Ghazali (1058–1111 CE) and Ibn Taymiyya (1263–1328 CE) interpreted this as meaning God possesses every perfection to an absolute degree — a position remarkably convergent with Anselm's formulation, though arrived at independently through Quranic exegesis rather than philosophical argument.

The implications in Islamic theology are sweeping. If God is the greatest conceivable being, then shirk (associating partners with God) is the gravest possible error — it's a category mistake, attributing to something finite what belongs only to the infinite. Worship, submission (islam), and moral accountability all flow from this foundational claim about God's unrivaled greatness.

Jewish scripture depicts God as incomparable and beyond full human grasp, which coheres with calling God the greatest conceivable being in classical terms Psalms 145:3. Psalm 145 declares, “Great is GOD… such greatness cannot be fathomed,” signaling an intrinsic limit to human comprehension of divine greatness Psalms 145:3. Psalm 77 intensifies this with a direct rhetorical challenge: “what god is as great as God?”—a denial of any rival greatness Psalms 77:14. Job affirms God’s transcendence and eternity: “God is greater than we can know—Whose age in years cannot be counted,” which implies qualitative supremacy and unbounded duration Job 36:26. Practically, these claims entail reverent worship, humility before mystery, and ethical holiness aligned with God’s “ways” being holy, since incomparable greatness entails moral perfection worthy of imitation and praise Psalms 77:14.

Christians receive the Psalms and Job as Scripture and so likewise confess God’s unfathomable and unrivaled greatness Psalms 145:3. Psalm 145:3 states, “Great is GOD and much acclaimed; such greatness cannot be fathomed,” marking God as surpassing all conceivable bounds of created greatness Psalms 145:3. Psalm 77:14 asks, “what god is as great as God?” which, read Christologically within Christian tradition, underscores exclusive worship of the one supremely great God Psalms 77:14. Job 36:26 adds that God’s greatness outstrips human knowledge and that God’s years cannot be counted, implying divine transcendence over time and creaturely limits Job 36:26. Accordingly, Christian practice emphasizes adoration, trust, and moral transformation in light of God’s holiness and incomparable majesty Psalms 77:14.

The Qur’an explicitly ascribes to God the attributes of unsurpassed majesty and supremacy: “To Him belongs whatever is in the heavens and whatever is in the earth, and He is the Most High, the Most Great,” asserting absolute ownership and loftiness beyond any conceivable rival Quran 42:4. God possesses all grandeur and might, anchoring exclusive devotion and awe Quran 45:37. Moreover, God begins creation and repeats it, and “to Him belongs the highest description,” indicating that every supreme perfection belongs to God alone, consistent with the idea of God as the greatest conceivable being Quran 30:27. Practically, this entails single-hearted worship, humility, and confidence in resurrection and justice grounded in God’s power to originate and re-create Quran 30:27.