Signs of Revelation - Part 4B: Philosophical Foundations of Modern Skepticism
Philosophical Foundations of Modern Skepticism
The practical objections grew from four philosophical roots. Pull them up one by one, and each turns out to be sawing the branch it sits on. The series capstone.
Having addressed the practical objections to divine revelation, we must now examine the deeper assumptions beneath contemporary skepticism. The objections of Part 4A often appear reasonable on the surface, but they rest on metaphysical and epistemological foundations that require critical examination. These four assumptions, physicalist materialism, historical bias, linguistic skepticism and anti-substance philosophy, are the true intellectual obstacles to accepting authentic divine revelation in the modern world.
§ I
The Metaphysical Foundation: Physicalist Materialism
Contemporary skepticism toward supernatural revelation often rests on physicalist materialism, the position that only material entities and physical processes exist. On this view consciousness, rationality and purpose are merely emergent properties of complex material arrangements, and if materialism is true, divine revelation becomes impossible by definition, since no immaterial agent could exist to give it. Prominent materialists like Daniel Dennett argue in works such as Consciousness Explained that mental phenomena reduce entirely to neural processes, while Paul and Patricia Churchland advocate an eliminative materialism on which mental states as traditionally understood simply do not exist.
Yet strict materialism faces problems that undermine its own credibility.
The problem of intentionality. Material processes, as physics describes them, exhibit no inherent aboutness, no intentional direction toward objects. Yet human thoughts are plainly about things: this thought is about materialism, that belief is about divine revelation. No purely material process accounts for this most basic feature of consciousness.
The problem of rationality. If human thoughts are merely the outputs of material causes operating by physical law, they have no rational connection to truth. As C.S. Lewis argued, if naturalism is true, then human reasoning becomes untrustworthy, including the reasoning that leads to naturalism (Miracles, ch. 3). Materialism saws through the rational branch that science itself sits on.
The problem of mathematical realities. Mathematics, logic and natural laws govern physical reality yet are not themselves physical entities. The materialist cannot adequately say why mathematical relationships should rule material processes at all, the mystery Eugene Wigner famously called the unreasonable effectiveness of mathematics in the natural sciences.
Indeed, the scientific method itself runs on non-material realities that materialism cannot explain:
Logical Principles
Non-contradiction, identity and excluded middle govern all inquiry yet are not material things
Mathematical Structures
Equations and geometric relationships that matter instantiates but does not create
Causal Uniformity
Prediction assumes stable, intelligible order rather than mere material flux
Teleological Organization
Even materialist biology recognizes functional order that mechanism alone does not supply
§ II
Historical Bias and Chronological Snobbery
Contemporary skepticism often assumes that modern people possess intellectual capabilities fundamentally superior to those of earlier ages. This chronological snobbery, the term is C.S. Lewis’s, treats ancient testimony about supernatural events as incredible simply because it comes from pre-scientific cultures. The bias appears in the work of Richard Carrier, who argues that the ancient world’s habits of myth-making and its standards of evidence disqualify its supernatural reports, and in assumptions underlying much of the Jesus Seminar’s historical criticism.
Examined critically, the prejudice proves arbitrary.
Observational competence. Reporting an unusual event does not require understanding its mechanism. A first-century witness could recognize that a man born blind suddenly saw exactly as accurately as a modern observer, ophthalmology or no ophthalmology.
Intellectual sophistication. The civilizations that produced Euclid, Aristotle and the aqueducts were not uniquely gullible. The assumption that they were lacks evidential foundation.
The reversal principle. If intellectual progress makes modern testimony more reliable than ancient testimony, then future progress will make our testimony unreliable. The principle that dismisses ancient sources on developmental grounds eventually dismisses everyone’s.
Selective application. Scholars readily accept ancient testimony about ordinary events while rejecting supernatural accounts from the same sources. That is not a historical method; it is a philosophical filter wearing history’s clothes.
And the stakes run wider than apologetics. If age itself discredits sources, most of our knowledge of the past collapses with them; if supernatural accounts are presumed legend, all culturally transmitted memory falls under the same presumption; and an evidential standard that bends according to the content of the claim rather than the quality of the testimony has stopped doing history at all.
§ III
Epistemological Skepticism and Linguistic Limitations
Contemporary philosophy includes influential movements that challenge the very possibility of objective knowledge. Post-modernism, particularly as developed by Jacques Derrida and Michel Foucault, suggests that language cannot reliably convey objective truth but merely reflects power structures and cultural constructions. If that is right, claims about divine revelation become meaningless, not because they are false but because language cannot reach reality at all.
But the position commits a performative contradiction.
The problem of self-reference. The claim that language cannot convey objective truth is itself a linguistic claim about objective reality. If true, it cannot be meaningfully stated; if meaningfully stated, it refutes itself.
Rational discourse presupposes truth. The very activity of philosophical argument assumes that language carries meaningful content about reality. Philosophers who argue against objective truth affirm it in the act of arguing.
Scientific communication. The success of science across cultures and languages demonstrates that words can reliably transmit objective information about the world. Scientific progress would be impossible if the skepticism were correct, and the skeptic’s laptop is a standing refutation of the skeptic’s thesis.
Meaningful discussion of divine revelation, like meaningful discussion of anything, requires only what all discourse requires: conceptual clarity, so that terms like miracle and revelation hold definite meanings across contexts; referential capability, so that language can reach beyond immediate experience to historical events and higher realities; and logical coherence, so that principles of reasoning apply to statements about the world. Deny these and there is nothing left to deny them with.
§ IV
Anti-Substance Philosophy and the Denial of Stable Natures
Modern philosophy also includes movements that deny stable substances or essences: the process philosophy of Alfred North Whitehead, the existentialism of Jean-Paul Sartre and various forms of nominalism. The tendency has roots in David Hume’s skepticism about causation and identity, continues in Dennett’s denial of substantial selves and reaches an extreme in Friedrich Nietzsche’s perspectivism, on which facts themselves are interpretations and stable truth an illusion.
If anti-substance philosophy were correct, revelation would indeed be in trouble. Without substantial reality God could possess no stable divine nature capable of consistent self-disclosure across time; without a stable human nature there could be no fit recipients of divine communication; and without stable meanings, revealed truths could carry no objective content valid across ages and cultures.
But the denial of substance destroys itself before it reaches theology.
The problem of identity. Without substantial identity there are no stable subjects of experience or knowledge. The philosopher who denies substance cannot remain the same philosopher long enough to finish the argument.
The problem of causation. Science presupposes that things possess stable causal powers grounded in their natures. Without natures, no reliable laws, no predictable processes, no chemistry worth the name.
The problem of knowledge. Knowledge requires stable relations between knower and known. If neither has substantial reality, knowledge is impossible, including knowledge of anti-substance philosophy.
The problem of communication. Meaningful speech requires stable meanings and consistent logic. The position undermines the very possibility of the discourse in which it is stated.
§ V
The Humean Challenge to Causation and Induction
David Hume’s skepticism about causation still shapes contemporary thought about miracles. In the Enquiry Concerning Human Understanding he argued that we never observe causal connections directly, only sequences of events, and his specific argument against miracles, that testimony for a miracle can never outweigh the uniform experience behind natural law, remains the skeptic’s favorite instrument.
The instrument, however, rests on assumptions it cannot pay for.
The assumption of closed causation. Hume assumes natural laws form a closed system that no higher cause can enter. That assumption is precisely the question at issue; asserting it is not arguing for it.
The problem of inductive knowledge. If Hume’s skepticism about causation is correct, we cannot have reliable knowledge of natural laws in the first place. His argument against miracles quietly dismantles the very conception of law on which it depends.
The uniformity assumption. The argument assumes past uniformity guarantees future uniformity, a claim Hume’s own framework about induction forbids him to justify.
The Thomistic account of causation carries the weight Hume’s cannot. Natural laws describe the regular operation of secondary causes, which in no way constrains the Primary Cause who sustains and governs all secondary causation (ST I, Q.105, A.5). Things possess real causal powers grounded in their substantial natures, so genuine causal relationships exist rather than merely apparent ones. And the universe exhibits genuine teleological order, which founds both natural regularity and the intelligibility of its rare, deliberate exceptions. On this account a miracle is not a broken law but a Word spoken over the grammar that the same Speaker wrote.
§ VI
The Verdict: Four Errors, Four Foundations
These four skepticisms reinforce one another and together form the modern resistance to supernatural revelation. Examined one at a time, each proves internally incoherent, and against each the Thomistic framework supplies the stable alternative on which knowledge, science and revelation alike can stand.
The Four Errors
Each refutes itself
- Materialism undermines the reason science requires and cannot account for the logic, mathematics and consciousness it presupposes
- Chronological bias dismisses ancient testimony by standards that dissolve all historical knowledge with it
- Linguistic skepticism states as objective truth that objective truth cannot be stated
- Anti-substance philosophy destroys the stable identity, causation and meaning its own defense requires
The Four Foundations
The Thomistic alternative
- Metaphysical realism: substances with real natures ground both natural law and rational investigation
- Epistemological confidence: reason reaches reality, including reality beyond immediate experience
- Linguistic capability: words can carry objective truth across minds, cultures and centuries
- Historical reliability: properly weighed testimony yields real knowledge of the past, wonders included
Conclusion
The Necessity of Philosophical Foundations
The practical objections of Part 4A drew their apparent force from the assumptions examined here, and when the foundations fail, the objections built on them lose their compelling character. Contemporary skepticism toward supernatural revelation often results not from careful evaluation of evidence but from commitments that make such evaluation impossible. The materialist who defines reality as exclusively physical cannot fairly weigh evidence of immaterial intervention. The historical skeptic who dismisses ancient testimony on chronological prejudice cannot assess the documents. The linguistic skeptic who denies objective truth cannot meaningfully engage the claim at all.
Remove the artificial constraints, and the positive evidence can finally be evaluated on its merits, where the convergence of scientific verification, historical documentation and spiritual discernment provides compelling grounds for recognizing authentic divine communication. The God who created human reason and wrote natural law into creation does not ask us to abandon rational investigation in order to accept His revelation. He provides evidence that satisfies both reason and faith, and the foundations needed to recognize His revelation are the same foundations needed for all human knowledge: confidence in reason, trust in reliable testimony, belief in objective truth and recognition of stable causal relationships. Modern skepticism must abandon these to reach its conclusion, and in abandoning them it undermines not merely religious faith but rational discourse itself.
The circle closes where this whole Christian Apologetics arc began, on the bridge between natural and supernatural religion: faith and reason are the two wings of Fides et Ratio, on which the human spirit rises to the contemplation of truth, and this series has flown on both. In embracing the possibility of divine revelation we affirm rather than deny the highest capabilities of human reason and the fundamental intelligibility of reality itself.
Five installments ago we asked whether the God whom reason finds has also spoken. The definition held. The counterfeit was mapped to its ceiling. The criteria stood their trial. The objections failed at the surface, and now at the root. To accept the possibility of divine revelation is not to abandon reason but to keep faith with it, and the God who made the mind that asks has never been afraid of the question.
The Complete Series
Part 1
What Makes a Revelation Supernatural?
The definition: supernatural in substance and supernatural in mode.
Part 2
The Problem of Counterfeit Revelation
The counterfeit mapped to its ceiling, from Deuteronomy to De Malo.
Part 3
Criteria for Authentic Divine Revelation
Five criteria in two tiers; the external pair above the ceiling.
Part 4BYou Are Here
Philosophical Foundations of Modern Skepticism
The four roots of modern doubt, each found sawing its own branch, and the Thomistic foundations that hold.
↑ Series Hub
Every article in the sequence, from the Five Ways to the signs of revelation.
Series Start →
Part 1: What Makes a Revelation Supernatural?
Begin the argument again from the definition.
Signs of Revelation · Part 4B of 5 · Series Complete
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