Self-existence of God

“I AM WHO I AM.”

— Exodus 3:14

Self-existence, or aseity (from the Latin a se, “from himself”), is the doctrine that God alone exists from and in himself, owing his being to no cause outside himself, while every creature exists only by receiving being from him.¹ Reformed theology has generally preferred the broader term independence to the bare Latin aseitas, since God is independent not only in his existence but in his perfections, decrees, and works.² Self-existence names what separates the Creator from every creature at the most basic level: God is, and everything else merely has being, and has it from him.³

Confessional Witness

The 1689 Second London Baptist Confession opens its description of God with this very attribute: he is “but one only living and true God; whose subsistence is in and of Himself, infinite in being and perfection… immutable, immense, eternal, incomprehensible, almighty, every way infinite, most holy, most wise, most free, most absolute.”⁴ The Westminster Confession states the identical clause word for word.⁵ This is Reformed teaching generally rather than a Baptist distinctive: both confessions fold God’s self-existence into their opening, single-sentence description of his being, naming it first among the perfections that follow rather than granting it a separate chapter.

Reformed orthodoxy debated the best word for the attribute, not its substance. The idea was traditionally expressed by the Latin term aseitas, “self-originated,” but Reformed theologians generally came to prefer independentia (independence), a broader word covering not only that God’s being is underived but that he is independent in his virtues, decrees, and works as well.² Bavinck traces the same shift: aseity “only expresses God’s self-sufficiency in his existence,” while independence “has a broader sense and implies that God is independent in everything: in his existence, in his perfections, in his decrees, and in his works.”³

Biblical Basis

God gives Moses his own name as the ground of his mission: “I AM WHO I AM… Thus you shall say to the people of Israel, ‘I AM has sent me to you’” (Ex. 3:14). Van Mastricht reads the name as God’s own answer to the question of his essence, teaching at once that God’s being cannot be fully grasped and what that being is.¹ Paul grounds all things in the same self-existence: “who has given a gift to him that he might be repaid? For from him and through him and to him are all things. To him be glory forever” (Rom. 11:35-36). Jesus grounds even the Son’s own life in the Father’s self-existence: “as the Father has life in himself, so he has granted the Son also to have life in himself” (John 5:26). Isaiah presses the same point against every rival god: “To whom then will you compare me, that I should be like him?… Who created these?… Not one is missing” (Isa. 40:25-26), naming God as the one uncaused source measured by no other standard.⁶

Historical Development

Patristic and medieval foundations

Augustine read the divine name itself as a claim about God’s unchangeable being: “the unchangeableness of God was prepared to suggest itself by this phrase ‘I AM WHO I AM.’”⁷ For God to say simply “I AM,” on this reading, is to name an existence entirely his own, unlike every other reputed god, whose existence, if it has one, is derived and dependent.⁸ Anselm developed the same insight into a positive argument: because a supreme, uncaused essence must exist to ground the existence of every dependent thing, “with the exception of the supreme essence itself, nothing exists that is not made by the supreme essence.”⁹ Medieval and Reformed theology both inherited this conviction that God’s self-existence grounds his other perfections rather than standing alongside them as one attribute among many.

Reformed orthodoxy: independence as the ground of every other attribute

Petrus van Mastricht devoted the opening chapter of his doctrine of God proper to “The Essence and Independence of God,” arguing that independence is not one attribute alongside the rest but the very essence from which they all take their origin: unity, immutability, infinity, simplicity, life, intellect, will, and omnipotence each follow from the fact that God, as the absolutely first being, is prior to and uncaused by anything else.¹⁰ John Gill, the Particular Baptist theologian, reached the same conclusion from the divine name itself: the Hebrew behind “I AM” is “expressive of the essence of God; of his necessary and self-existence, for God naturally and necessarily exists; which cannot be said of any other,” since every creature “owe[s] their being to the arbitrary will of God.”¹¹ Elsewhere Gill argues the same point from God’s simplicity: an uncompounded being admits no prior cause, so “it may be argued from his ‘independency,’ he is self-existent; the first Cause, and without any cause.”¹²

Modern retrieval

Contemporary Reformed theologians continue to treat self-existence as foundational rather than one attribute among many. Bavinck names independence, not omnipotence or omniscience, as the attribute that most sharply marks “the immeasurable distinction between the Creator and creature.”³ Barrett calls aseity “the key that unlocks God’s attributes,” since every other perfection presupposes that God has life, wisdom, and power in and of himself rather than receiving them from some prior source.⁶ Sammons frames the same doctrine pastorally, tracing how a God who is himself “the fountain of life” (Ps. 36:9) answers the two questions “asked by children and philosophers alike”: where life comes from, and what happens when it ends.¹³

Opposing Views

Process theology and open theism deny God’s self-existence to different degrees, on what theologian James Dolezal calls “theistic mutualism.” On the “hard” version, associated with process theology, God depends on the world outright: the world “affects God necessarily and causes actual change in him.”¹⁴ On the “soft” version, associated with open theism, God does not need the world to exist, but he does allow the world to bring about real change in his own being, on the premise that a genuine relationship with creatures requires it.¹⁴ Carter judges that in either form, “God’s being is neither immutable nor independent of creation,” and that the difference between the hard and soft versions is ultimately “a matter of degree” rather than kind.¹⁴

Objections and Responses

Doesn’t saying God exists “of himself” mean he caused himself, which is a contradiction, since a cause must exist before its effect? No: aseity does not mean self-causation. Barrett answers that “one would be mistaken to conclude that, if God has no external cause, then he must cause himself,” since self-causation would itself contradict God’s simplicity, eternity, and immutability.⁶ God’s self-existence means he has never not existed and depends on no prior cause, not that he brought himself into being.

If God needs nothing, why did he create the world, and doesn’t that make creation arbitrary or purposeless? Reformed theology denies that God created out of need. Barrett rejects the popular picture of a lonely God who made the world to fill some emptiness in himself: “God is not dependent on the world for his existence, nor is he dependent on the world for his happiness and self-fulfillment. Instead, he possesses life in and of himself.”⁶ Creation adds nothing to God’s own fullness; it flows from that fullness, freely given rather than needed.

Related Doctrines

Multimedia

Attributes of God: Where Did God Come From? or the Self-Existence of God (MP3), by S. Lewis Johnson

References

Petrus van Mastricht, Theoretical-Practical Theology, vol. 2, Faith in the Triune God, ed. Joel R. Beeke, trans. Todd M. Rester (Grand Rapids: Reformation Heritage Books, 2019), chap. 3, “The Essence and Independence of God,” 111-133. ↩ ↩²
Louis Berkhof, Systematic Theology (London: Banner of Truth Trust, 1969), 45. ↩ ↩²
Herman Bavinck, Reformed Dogmatics: Abridged in One Volume, ed. John Bolt (Grand Rapids: Baker Academic, 2011), chap. 8, “The Living, Acting God,” “Aseity/Independence.” ↩ ↩² ↩³
The Second London Baptist Confession of Faith (1689), chap. 2, “Of God, and of the Holy Trinity,” para. 1. ↩
The Westminster Confession of Faith (1646), chap. 2, “Of God, and of the Holy Trinity,” para. 1. ↩
Matthew Barrett, None Greater: The Undomesticated Attributes of God (Grand Rapids: Baker Books, 2019), chap. 4, “Does God Depend on You? Aseity.” ↩ ↩² ↩³ ↩⁴
Augustine, quoted in Craig A. Carter, “What Is Trinitarian Classical Theism?,” in Contemplating God with the Great Tradition: Recovering Trinitarian Classical Theism (Grand Rapids: Baker Academic, 2021), chap. 2. ↩
Carter, chap. 2. ↩
Anselm, Monologion 3, quoted in Barrett, chap. 4. ↩
Mastricht, 2:122. ↩
John Gill, A Body of Doctrinal Divinity; or, A System of Evangelical Truths, Deduced from the Sacred Scriptures, 2 vols. (London: Printed for the Author, and Sold by George Keith, 1769), book I, chap. 3, “Of the Names of God.” ↩
Gill, book I, chap. 6, “Of the Infinity of God, His Omnipresence and Eternity.” ↩
Peter Sammons, The Forgotten Attributes of God: God’s Nature and Why It Matters (Fort Washington, PA: CLC Publications, 2023), chap. 3, “Aseity,” 58-74. ↩
Craig A. Carter, “Do We Worship the God of the Bible?,” in Contemplating God with the Great Tradition: Recovering Trinitarian Classical Theism (Grand Rapids: Baker Academic, 2021), chap. 9. ↩ ↩² ↩³