Apologetics

Apologetics is the reasoned defense of the Christian faith: answering objections to it and setting out grounds for believing it is true. Peter’s charge to “make a defense to anyone who asks you for a reason for the hope that is in you” (1 Pet. 3:15) is apologetics’ own biblical mandate. It is usually distinguished from polemics, which corrects error within the church rather than defending the faith to outsiders. Confessional Reformed theologians agree apologetics is a Christian duty; they have long disagreed over its proper method, not over whether to practice it at all.

Confessional Contrast

The 1689 Second London Baptist Confession has no chapter devoted to apologetics as such, but its opening chapter’s account of how Scripture’s authority is known bears directly on the later methodological dispute. Paragraph 4 grounds Scripture’s authority “wholly upon God… the Author thereof,” not on the testimony of any person or church.¹ Paragraph 5 then names the sort of external “arguments” apologetics supplies, among them “the heavenliness of the matter, the efficacy of the Doctrine, and the Majesty of the stile… and many other incomparable Excellencies,” and says these “abundantly evidence” Scripture “to be the Word of God.” Yet it locates “full perswasion, and assurance of the infallible truth” not in those arguments but “from the inward work of the Holy Spirit, bearing witness by and with the Word in our Hearts.”² The confession affirms both halves at once, real evidential force in apologetic arguments and their insufficiency alone to produce full certainty, without itself adjudicating which apologetic method, classical, evidential, presuppositional, or Reformed epistemology, best accounts for that balance.

Historical Development

Patristic beginnings

Herman Bavinck locates the discipline’s first flowering in “the effective apologetic greatness of the second century,” when Christian writers appealed to fulfilled prophecy and miracles alongside a moral argument from Christian conduct itself: believers’ “singular brotherly love, hospitality, generosity, and the care of widows and orphans, the poor and sick, prisoners and slaves,” standing in stark contrast to surrounding pagan practice, gave the church’s defense “compelling cogency because Christians were firm in their belief and lived in practice.”³

Rome’s motiva credibilitatis and the Reformation

Medieval scholastic theology, in Bavinck’s account, gradually turned “the truth of faith into the content of reason,” dividing natural from supernatural truth. Post-Reformation Roman Catholic theology, codified at the First Vatican Council, made this division formal: external proofs became “preambles of faith,” the “motiva credibilitatis” (“motivations toward belief”) that prepare the mind for sacramentally infused grace, with the believer proceeding “upward to the vision in degrees as on a ladder.”⁴ The Reformation rejected Rome’s hierarchical scheme “in principle,” grounding faith instead on “divine authority and the work of the Holy Spirit.” Even so, Bavinck notes, Reformation-era theologians, Calvin among them, continued to offer historical proofs for revelation’s truth, a habit that unintentionally fed the later “emancipation of reason from faith.”⁴

Enlightenment rationalism and its critics

Socinianism, Arminianism, Cartesianism, and deism each pressed natural theology toward independence from, and eventually replacement of, revealed theology; the drift culminated in the history-of-religions method associated with Ernst Troeltsch, which treated theology “in an objective, neutral, historical-critical manner,” severed from the church and from faith, “a far cry from” the patristic apologetic era.⁵ Writing against this background, Bavinck states his own verdict plainly: “Good apologetics is a blessing to the church and to the world; the early church proved this. A valid apologetic, however, follows faith and does not attempt to argue the truth of revelation in an a priori fashion.”⁵ He rejects equally “a subjection of faith to reason” and “a divorce of faith and reason.”⁵

Writing from within the Old Princeton tradition a generation before Bavinck’s Reformed Dogmatics, A. A. Hodge classed Apologetics as a formal theological department in its own right, covering “the Theistic argument and Natural Theology, the evidences of Christianity, the Historic Origin of the Scriptures, the Canon, and Criticism and Exegesis of the Sacred Text.”⁶ That traditional scope still frames the field, even as twentieth-century Reformed theologians came to dispute the method by which any of it should be argued.

Arguments

Apologists divide chiefly over how much common rational ground can be assumed with an unbeliever before appealing to Scripture.

Classical

The classical method argues for God’s existence through natural theology before turning to historical evidences for Christianity specifically, on the premise that theism must be established first if evidence for the Christian God is to mean anything.⁷ Michael Kruger, citing William Lane Craig’s own statement of the position, notes that a classical apologist’s certainty does not, in the end, rest on the historical case alone: Craig holds that new historical evidence “would not change his beliefs about things like the canon because the testimony of the Holy Spirit makes him sure that such beliefs are correct regardless of changes in the evidence.”⁷

Evidential

The evidential method treats positive evidences, miracles chief among them, as direct support for Christianity’s truth without first establishing theism as a separate step, arguing cumulatively from a range of historical and philosophical considerations.⁷

Presuppositional

Presuppositional apologetics, developed by Cornelius Van Til, denies that sufficient common ground exists between believer and unbeliever for classical or evidential arguments to succeed on professedly neutral terms. Van Til argued transcendentally instead: “every fact in the universe is what it is by virtue of the place that it has in the plan of God,” so that no fact possesses “existential autonomy” from that plan, arguments must presuppose the truth of Christianity as the condition for any fact being intelligible at all, rather than reason their way toward it from neutral premises.⁸

Reformed epistemology

Reformed epistemology, associated with Alvin Plantinga, holds that belief in God can be rational, “properly basic,” without argumentative support at all. On this account human beings possess a sensus divinitatis, “a disposition to form certain beliefs about God” under the right circumstances, so that belief in God need not wait on a prior demonstration of his existence. Plantinga traces the essential claim, that the rationality of belief in God does not require such a demonstration, to Calvin, Bavinck, and Barth alike.⁹

Objections and Responses

Presuppositionalists object that classical and evidential apologetics assume a neutrality that does not exist. Since, on Van Til’s argument, no fact stands outside God’s plan, an apologetic that reasons toward Christianity from supposedly autonomous, religiously neutral premises has already conceded the very autonomy Scripture denies human reason possesses.⁸

Bavinck objects, from within the older Reformed tradition itself, that evidence cannot ground faith even when it genuinely supports it. Relying on reason “to convert or ground the faith on intellectual grounds alone will always disappoint,” he writes; “submitting to the validation of revelation by an intellectual priesthood provides feeble certainty,” since the historical and rational case for Christianity is “never done,” and most believers lack “the scholar’s leisure to engage in calm, extensive investigation and reflection.”⁵ This is a caution about what apologetic argument can accomplish, not a rejection of apologetics itself: Bavinck calls “good apologetics…a blessing to the church and to the world.”³ John Calvin had already grounded this same caution confessionally: full certainty of Scripture’s divine authority rests, for Calvin, on “the testimony of the Holy Spirit,” not on external proofs alone, however genuinely those proofs “evidence” Scripture’s divine origin.¹⁰

Related Doctrines

References

The Second London Baptist Confession of Faith (1689), chap. 1, “Of the Holy Scriptures,” para. 4, text as reproduced by CCEL, ccel.org/creeds/bcf/bcfc01.htm. ↩
The Second London Baptist Confession of Faith (1689), chap. 1, “Of the Holy Scriptures,” para. 5, text as reproduced by CCEL, ccel.org/creeds/bcf/bcfc01.htm. ↩
Herman Bavinck, Reformed Dogmatics: Abridged in One Volume, ed. John Bolt (Grand Rapids: Baker Academic, 2011), chap. 6, “Faith.” ↩ ↩²
Bavinck, Reformed Dogmatics: Abridged in One Volume, chap. 6, “Faith.” ↩ ↩²
Bavinck, Reformed Dogmatics: Abridged in One Volume, chap. 6, “Faith.” ↩ ↩² ↩³ ↩⁴
Archibald Alexander Hodge, Outlines of Theology (New York: Robert Carter and Brothers, 1879), 65-66. ↩
Michael J. Kruger, Canon Revisited: Establishing the Origins and Authority of the New Testament Books (Wheaton, IL: Crossway, 2012), chap. 2, “Tracing the Origins,” citing R. C. Sproul, John Gerstner, and Arthur Lindsley, Classical Apologetics (Grand Rapids: Zondervan, 1984); William Lane Craig, “Classical Apologetics,” in Steven B. Cowan, ed., Five Views on Apologetics (Grand Rapids: Zondervan, 2000), 35-38; and Gary Habermas, “Evidential Apologetics,” in Cowan, Five Views on Apologetics. ↩ ↩² ↩³
Cornelius Van Til, The Defense of the Faith, 3rd ed. (Phillipsburg, NJ: Presbyterian and Reformed, 1967), 204, quoted in Samuel G. Parkison, “Irresistible Beauty: Beholding Triune Glory in the Face of Jesus Christ” (PhD diss., Midwestern Baptist Theological Seminary, 2021), chap. 2, n.11. ↩ ↩²
Steven J. Duby, God in Himself: Scripture, Metaphysics, and the Task of Christian Theology (Downers Grove, IL: IVP Academic, 2019), chap. “Preparation: The School of Grace.” ↩
John Calvin, Institutes of the Christian Religion, trans. Henry Beveridge (Edinburgh: Calvin Translation Society, 1845), bk. 3, chap. 2, “Of Faith: The Definition of It, Its Peculiar Properties.” ↩