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Steve Duby, PhD

Associate Professor of Theology

Dr. Steven J. Duby is associate professor of theology at Phoenix Seminary, having previously taught at Grand Canyon University. He teaches courses in systematic theology and hermeneutics. His main research interests include the doctrine of God (the divine attributes and the Trinity) and Christology. He also has a special interest in the theology of Thomas Aquinas and in post-Reformation and modern Protestant theology.

He is the author of Jesus and the God of Classical Theism: Biblical Christology in Light of the Doctrine of God (Baker, 2022), God in Himself: Scripture, Metaphysics, and the Task of Christian Theology (IVP, 2019), and Divine Simplicity: A Dogmatic Account (Bloomsbury, 2016). Further, in light of his commitment to integrating the work of systematic theology and scriptural exegesis, he is currently preparing a commentary on the book of Habakkuk for the International Theological Commentary series.

He and his wife, Jodi, grew up in Michigan and have four children.


Ph.D., University of St Andrews

M.Div., Denver Seminary

B.S., Moody Bible Institute.


Divine Simplicity: A Dogmatic Account

God in Himself


Articles and Chapters

“Further Thoughts on Natural Theology, Metaphysics, and Analogy.”  A Journal of Catholic and Evangelical Theology 2021, Vol. 30(3) 307 –321.


“Goodness, gratitude, and divine freedom.”  Scottish Journal of Theology 74, forthcoming.


“The Unity of God and the Unity of the Economy.”  In Matthew Barrett, ed.  The

Doctrine of the Trinity: Retrieving Nicene Orthodoxy.  Downers Grove: IVP Academic, forthcoming.


“Further Thoughts on Natural Theology, Metaphysics, and Analogy.”  Pro

Ecclesia 30, forthcoming.


“Eighteenth- and Nineteenth-Century Reformed, Anglican, Lutheran Reception of

Aquinas,” 343-58.  In Matthew Levering et al., eds.  The Oxford

Handbook of the Reception of Aquinas.  Oxford: Oxford University Press, 2021.


“Goldingay on God: Addressing the Distinction between Biblical and Dogmatic

Theology.”  Horizons in Biblical Theology 42 (2020), 108-30.


God in Himself: Scripture, Metaphysics and the Task of Christian Theology.

Studies in Christian Doctrine and Scripture.  Downers Grove: IVP Academic, 2019.


“Receiving No Perfection from Another: Francis Turretin on Divine Simplicity.”

Modern Theology 34 (2019), 522-30.


“Scripture as Cognitive Principle of Christian Dogmatics.”  Neue Zeitschrift für

Systematische Theologie und Religionsphilosophie 61 (2019), 223-40.


“‘For I am God, not a man’: Divine Immutability, Divine Repentance and the

Creator-creature Distinction.”  Journal of Theological Interpretation 12 (2018), 149-69.


“Divine Action and the Meaning of Eternity.”  Journal of Reformed Theology 11

(2017), 353-76.


“Divine Immutability, Divine Action and the God-world Relation.”  International

Journal of Systematic Theology 19 (2017), 144-62.


“Free Speech: Scripture in the Context of Divine Simplicity and Divine

Freedom.”  Irish Theological Quarterly 82 (2017), 197-207.


“Trinity and Economy in Thomas Aquinas.”  Southern Baptist Journal of

Theology 21 (2017), 29-51.


“Election, Actuality and Divine Freedom: Thomas Aquinas, Bruce McCormack

and Reformed Orthodoxy in Dialogue.”  Modern Theology 32 (2016), 325-40.


Divine Simplicity: A Dogmatic Account.  T & T Clark Studies in Systematic

Theology.  London: Bloomsbury, 2016.


“Atonement, Impassibility and the Communicatio Operationum.”

International Journal of Systematic Theology 17 (2015), 284-95.


“Classical Christian Theism and the Criterion of Particularity.”  International

Journal of Systematic Theology 15 (2013), 196-215.


“Divine Simplicity, Divine Freedom and the Contingency of Creation: Dogmatic

Responses to Some Analytic Questions.”  Journal of Reformed Theology 6

(2012), 115-42.


“Working with the Grain of Nature: Epistemic Underpinnings for Christian

Witness in the Theology of Herman Bavinck.”  The Bavinck Review 3 (2012), 60-84.


“The Cross and the Fullness of God: Clarifying the Meaning of Divine Wrath in

Penal Substitutionary Atonement.”  Scottish Bulletin of Evangelical Theology 29 (2011), 165-76.



Selected Conference Presentations


“Bodies of God?  Divine Presence, Revelation, and Metaphor,”

SBL Annual Meeting (Nov. 2021)


“Goodness, gratitude, and divine aseity,” Scripture and Doctrine Seminar,

Tyndale House Scripture Collective and Institute for Biblical Research

(Nov. 2021)


“Further Thoughts on Natural Theology, Metaphysics, and Analogy,”

ETS Annual Meeting, Book Symposium on God in Himself (Nov. 2020)


“Christ’s Divinity and the Drama of the Economy”

Thomistic Institute Conference, Ave Maria University (Feb. 2020)


“Motion, Divine Action and the Logic of Eternity”

LA Theology Conference (Jan. 2019)


“Reformed Catholicity and the Analogia Entis

Davenant Institute Convivium Irenicum (May 2018)


“Divine Action and God’s Relationship to the World”

Davenant Institute Convivium Irenicum (Aug. 2017)


“Divine Immutability, Divine Action and the God-world Relation”

Classical Theism Workshop, University of St. Thomas (July 2016)


“Free Speech: Scripture in the Context of Divine Simplicity and Divine Freedom”

Theology Connect Conference, Sydney, Australia (July 2016)

Courses Taught

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