Natural Theology • Existence of God • Intermediate
Argument from Objective Truth
Primary question: If objective, mind-independent truths exist — including truths that hold necessarily and eternally, such as those of logic and mathematics — what best explains their reality?
Argument map
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Common mistakes
Don't say
Treating the argument as claiming all truths (including contingent empirical ones) require a divine mind.
Instead
Clarify the argument targets specifically necessary, eternal, mind-independent truths like logic and mathematics, not ordinary contingent facts.
Don't say
Assuming the argument proves the full theistic God (moral, personal, providential) rather than merely a necessary mind.
Instead
Present the argument as establishing a necessary grounding intellect, with further argument needed to reach the fuller theistic conception.
Don't say
Dismissing Platonism as obviously false rather than engaging its access problem seriously.
Instead
Acknowledge Platonism is a live, sophisticated position and argue comparatively that theistic conceptualism better explains the mind-truth connection.
Don't say
Presenting global relativism about truth as a serious rival without noting its self-referential incoherence.
Instead
Note that global relativism about truth undermines its own claim to be true, a standard and important response.
What would change my mind? — Christian position
A fully satisfying non-theistic account resolving the access problem for abstract objects, with no remaining explanatory advantage for theism, would weaken this argument's force.
What would change my mind? — Skeptical position
A demonstration that necessary truths (logic, mathematics) are best and most naturally grounded in an eternal, necessarily existing intellect, with no comparably economical naturalistic alternative, would strengthen the case considerably.
Why does this matter?
This argument matters because it connects the existence of God to the very rational structure that makes inquiry, mathematics, and logical reasoning possible, suggesting theism offers not just an explanation of physical existence but of the intelligibility of reality itself. It also highlights genuine, unresolved puzzles in philosophy of mathematics (like the access problem) that any worldview, theistic or naturalistic, must eventually address.
For further study
Primary and secondary sources on both sides of this question. Reading the strongest opposing case is part of the work, not a concession.
Mathematical Truth — Paul Benacerraf
The classic 1973 paper articulating the access problem for Platonism.
The Unreasonable Effectiveness of Mathematics in the Natural Sciences — Eugene Wigner
Essay highlighting the puzzling applicability of mathematics to physics.
Theistic Conceptual Realism — Greg Welty
Contemporary sustained defense of grounding necessary truths in the divine mind.
Confessions and On the Trinity (selections on divine ideas) — Augustine of Hippo
Classical source of the divine ideas tradition.
The Foundations of Arithmetic — Gottlob Frege
Foundational defense of the objectivity of mathematical truth against psychologism.