We live in a world defined by composition. Everything in our creaturely experience is made up of parts. A physical body is composed of organs, tissues, and cells; a molecule is assembled from atoms; a clock is built from gears, springs, and levers. In our finite environment, complexity is often equated with greatness. We admire intricate machinery, multi-layered software, and complex personalities.
Tragically, when modern Christians attempt to think about God, we routinely project this creaturely composition onto the uncreated Creator.
We often view God as a sort of cosmic recipe, a divine Being assembled from a pinch of love, a cup of justice, a measure of power, and a dash of omniscience. In popular religious thought and contemporary analytic philosophy, this error frequently wears a sophisticated mask, defining God merely as “the sum of all great-making properties.” But our sanctified Christian instincts revolt against such a framing. God is not an equation or a mathematical formula to be calculated, balanced, or aggregated. He is not a bundle of abstract, self-existent properties called “love,” “power,” and “justice” that somehow fuse together to form a Deity.
When we treat His attributes as separate “parts” or “ingredients” that combine to form His character, as though God possesses love in one compartment of His being and justice in another, we fall into what theologians call “theistic personalism.” This model demotes God from the ultimate, simple Source of reality into merely “a being” among other beings who happens to possess very high degrees of various abstract properties.
When we reduce God to a composite collection of parts, we subtly destroy Him. A god composed of parts is a god who depends on those parts. A god who is a collection of attributes is a contingent being who requires an assembler.
To rescue our theology from this creaturely idolatry, we must recover one of the most vital, safeguard doctrines of classical Christian orthodoxy: the doctrine of Divine Simplicity (Simplicitas Dei).
Because God is the uncreated, self-existent Creator, He is entirely simple, devoid of all composition, parts, or potentiality, meaning that God does not merely possess attributes like love, justice, and power, but is Himself His own divine essence, guaranteeing that His character is utterly unchangeable and His promises eternally secure.
What Is Divine Simplicity? The Rejection of Composition
To understand divine simplicity, we must begin with a clear definition of what the doctrine denies. In classical theology, to say that God is “simple” does not mean He is easy to understand or naive. Rather, it means He is uncompounded, He is not composed of parts.
Reformed orthodoxy, following the catholic consensus of the ancient and mediaeval church, asserts that God is free from every form of composition:
- No Physical Composition (Body and Parts): God is a pure, uncreated Spirit (John 4:24). He is not composed of physical elements, matter, or physical dimensions. Passages of Scripture that speak of God’s “hand,” “eyes,” or “wings” are divine accommodations, anthropomorphic language designed to communicate His actions in terms finite creatures can understand.
- No Essence and Existence Composition: In every creature, there is a distinction between what it is (essence) and that it is (existence). A unicorn has an essence (we can define what it is), but it lacks existence. You and I possess both, but our existence is received and derived. In God alone, His essence is His existence. As God revealed Himself to Moses at the burning bush, “I AM WHO I AM” (Exodus 3:14). God does not have existence; He is Existence itself.
- No Subject and Attribute Composition: In creatures, attributes are “accidents”—properties added to our underlying substance. A man can be wise today and foolish tomorrow; his humanity remains intact even if his wisdom changes. But God does not “have” attributes attached to His essence like ornaments on a tree. God is His attributes. God does not merely have love; God is love (1 John 4:8). God does not merely have power; God is Power.
- No Potentiality and Actuality Composition: Creatures are constantly changing, moving from potentiality to actualization (e.g., an acorn becoming an oak tree, or a student growing in knowledge). God is Pure Act (Actus Purus). He possesses no passive potentiality to become anything other than what He eternally is. He cannot grow in wisdom, shift in emotion, or develop in holiness.
As the Westminster Confession of Faith succinctly summarizes, the living God is “a most pure Spirit, invisible, without body, parts, or passions” (WCF 2.1).
Resolving the Attributes: In Ratio vs. In Res
Here we encounter an immediate, practical objection: If God is simple and uncompounded, why does Holy Scripture describe Him using dozens of different attributes? Why does it speak of His wrath, His mercy, His holiness, His justice, and His grace as distinct realities?
To answer this challenge without destroying divine simplicity, we must re-employ the vital scholastic tool we established in our study of theological method: the distinction between things existing in ratio (in our conceptual minds) versus in res (in reality itself).[1]
In Res (In Reality)
In God Himself (in res), there are no separate compartments or distinct parts. God’s love is His justice, His justice is His power, and His power is His simple essence. As Francis Turretin famously affirmed, “The orthodox teach that they are really the same with his essence but are to be distinguished from it virtually and eminently.”[2] God is entirely and simply everything that He is.
In Ratio (In Our Mind)
Because our finite human minds cannot process or comprehend the infinite, uncompounded simplicity of the divine nature in a single, exhaustive intuition, God graciously accommodates His self-revelation to us. He shines His single, uncreated beam of light through the prism of creation and Scripture, refracting it into distinct colors that our creaturely eyes can perceive: love, justice, mercy, power, and wisdom.
The distinction between God’s attributes exists in ratio—in our conceptual processing of His accommodated revelation—not in res within the divine essence itself. As Turretin carefully explained, although our formal conceptions of the essence and properties of God are diverse, they cannot be called false:
Although our formal conceptions of the essence and properties of God may be diverse, yet they cannot be called false. For there answer to them as many objective conceptions, actually indivisible indeed in God on account of his most perfect simplicity, but yet virtually and eminently distinct.[3]
When we conceive of God’s distinct attributes, we are not imagining something untrue about Him but rather processing His simple essence according to our finite creaturely capacity. Turretin resolves this tension with razor-sharp precision:
He who conceives what is actually and really one and simple in God as actually and really diverse, conceives what is false. But he who conceives that which is actually one in itself as more than one virtually and extrinsically or objectively, does not conceive what is false. Rather he conceives the thing imperfectly and inadequately on account of the weakness of the human intellect and the eminence and perfection of the divine nature.[4]
When God executes justice upon the unrepentant, that is the single, simple divine essence acting in holiness. When God shows mercy to the brokenhearted, that is the exact same simple divine essence acting in love. The change is not in God; the distinction arises in how His single, simple action touches different creaturely contexts.
Why Simplicity Is Essential: Defending Orthodoxy
Divine simplicity is not a dusty, metaphysical technicality. It is the indispensable centerpiece that holds the entire doctrine of God together. If you remove divine simplicity, the classical doctrine of God collapses like a house of cards.
Simplicity Guarantees Divine Aseity and Independence
If God were composed of parts, those parts would logically precede Him. Something or someone would have to assemble those parts into a unified whole. A composite god would be a created god—dependent upon the components that make him up. Simplicity ensures that God is a se (self-existent) and utterly independent of creation.
Simplicity Protects Divine Immutability
A composite being can be divided, changed, or dissolved. Anything made of parts can undergo alteration as those parts shift, interact, or decay. Because God is simple and free from composition, He cannot change (Malachi 3:6, James 1:17). He is the immovable Rock upon whom our salvation rests.
Simplicity Refutes Social Trinitarianism & Tritheism
In Trinitarian theology, simplicity guards us against the modern error of “Social Trinitarianism,” the notion that the Father, Son, and Holy Spirit are three distinct beings bound together in a divine society or community. If the three persons possessed separate portions of the divine essence, Christianity would be reduced to tritheism (worshiping three gods). Simplicity maintains that the Father, Son, and Holy Spirit each possess the one, undivided divine essence (ousia) in its entirety, distinguished solely by their eternal personal relations (hypostases).
Resting in an Undivided God
Loved ones, let us bring this lofty, high-soaring truth down to the quiet, anxious places of the soul. Why does divine simplicity matter when you are sitting in a hospital waiting room, wrestling with grief, or struggling against indwelling sin?
It matters because a composite god cannot be fully trusted.
If God were composed of competing parts, you would constantly have to worry about which “part” of God you were going to get today. You would fear that His justice might overpower His love, or that His sovereignty might operate apart from His goodness. You would live in constant anxiety that God’s internal attributes were at war with one another.
But divine simplicity guarantees that God is never divided against Himself.
God’s love is not a soft sentiment that overrides His justice; His love is holy, and His justice is loving. When God exercises His sovereign authority over your life, He is exercising His goodness at the exact same moment. Every action of God toward you in Jesus Christ is an action of His entire, simple, undivided being.
When you look at the cross of Jesus Christ, you are not watching a divine family drama where a loving Son placates an angry Father, nor are you watching one divine attribute defeat another. You are beholding the uncompounded glory of the simple God, where perfect justice and perfect mercy are revealed as one unified act of divine redemption.
You do not worship a god who is trying to balance His competing emotional states. You worship the Lord God Almighty: simple, indivisible, unchangeable, and whole. In Him, there is no shadow of turning. You can rest your entire life, your eternal destiny, and your soul’s peace upon His simple, unshakeable nature.
Conclusion
God is not a puzzle to be assembled, a recipe to be mixed, an equation to be calculated, or a collection of parts to be analyzed. He is the infinite, uncreated, simple Lord of hosts.
As we prepare to examine His underived self-existence in our next study on Divine Aseity, let us fix this foundational baseline in our minds: everything in God is God Himself. When we bow before Him, we do not worship a collection of divine properties; we worship the simple, triune majesty who is entirely and simply everything that He has revealed Himself to be.
May the simple God, Father, Son, and Holy Spirit, grant us grace to adore His indivisible glory, casting down our idol-making imaginations, and resting in His unchangeable love forever and ever. Amen.
Key Terms
- Divine Simplicity (Simplicitas Dei): The classical orthodox doctrine that God is entirely uncompounded and free from all composition, parts, or potentiality. God is identical with His essence, and His attributes are not separate components of His being.
- Actus Purus (Pure Act): A classical scholastic term describing God as absolute reality with no passive potentiality. God is fully actualized in His eternal essence, incapable of undergoing development, change, or passivity.
- Anthropomorphism: The use of human-centered language, imagery, or physical descriptions (e.g., God’s “hand” or “eyes”) to communicate accommodated truths about the spiritual, incorporeal God to creaturely minds.
- Theistic Personalism: A modern theological and philosophical error that views God as “a being” alongside other beings who possesses various properties (like power or love) in extreme degrees—often defining Him as “the sum of all great-making properties”—rather than viewing God as the uncreated, simple Source of all being (Ipso Esse Subsistens).
- In Ratio vs. In Res: The scholastic distinction between conceptual distinctions made in human reason as it processes reality (in ratio) and real, objective distinctions that exist within the object itself (in res).
[1] See https://reformedarsenal.com/the-school-of-precision-reclaiming-the-scholastic-method-for-modern-theology/ for more discussion on in ratio vs in res
[2] Francis Turretin, Institutes of Elenctic Theology, ed. James Jr Dennison, trans. George Giger, vol. 1 (P&R Publishing, 1992), 3.5.5.
[3] Ibid., 3.5.10.
[4] Ibid., 3.5.12.