Faith Against the Skeptics

Fr. Augustine · The Intellectual10 min readUpdated August 14, 2026

The objections are not new, and they are not stupid. Why would a good God permit a child to suffer? Hasn't science explained what religion once explained? If God exists, why is he so hard to find? Questions like these have unsettled believers for as long as there have been believers — and the Church has never asked anyone to pretend otherwise.

Scripture commands a defense and dictates its tone in the same breath: be “ready always to satisfy every one that asketh you a reason of that hope which is in you,” and do it “with modesty and fear” (1 Peter 3:15–16). This article takes the three strongest objections — not straw men — and gives the Church's actual answers, drawn from what Catholics really believe: Aquinas, the Catechism, Newman. No spin, no slogans.

The Church's method: state the objection at its strongest

Notice first how the Catholic tradition treats skeptics. St. Thomas Aquinas built the Summa Theologiae on a discipline modern debate has forgotten: every question opens with the strongest objections he could find, stated fairly, before he answers. On the existence of God, the first objection he records is the problem of evil — he put the hardest question on page one, eight centuries ago.

Behind that method stands a conviction the Church has staked her life on: truth cannot contradict truth, because the same God authors the world and revelation (CCC 159). If Catholicism is true, hard questions are no threat to it. If it were false, defensiveness would not save it. That confidence is the posture of everything that follows.

Objection one: the problem of evil

Here it is at full strength, roughly as Aquinas himself recorded it: if God is all-good, he wills to prevent evil; if he is all-powerful, he is able to; yet evil exists — therefore no such God does (Summa Theologiae I, q. 2, a. 3, obj. 1). Every honest believer has felt the force of this, usually not as a syllogism but as a hospital room.

Notice what the Church refuses to do. The Catechism calls this question as pressing as it is unavoidable, as painful as it is mysterious, and says plainly that no quick answer will suffice (CCC 309). Anyone selling a one-liner has not understood the problem. What the faith offers is a whole way of seeing, in which every doctrine — creation, freedom, providence, the Cross — carries part of the weight.

The outline runs like this. God freely created a world “in a state of journeying” toward a perfection it does not yet have, and in such a world physical evil exists alongside physical good (CCC 310). Moral evil — the far darker thing — entered through creaturely freedom. God permits it because he respects the freedom love requires, and because he can draw good even out of it (CCC 311). Scripture stakes this claim in the mouth of Joseph, facing the brothers who sold him: “You thought evil against me: but God turned it into good” (Genesis 50:20).

And then Christianity says the one thing no other answer to evil has dared to say: God did not explain suffering from a safe distance. He entered it. The worst moral evil ever committed — the torture and murder of the innocent Son of God — became the very act by which evil was defeated (CCC 312). The Christian answer to the problem of evil is not an argument. It is a crucifix. Full understanding is promised only when we see God face to face (CCC 314).

One pastoral note: a person in raw grief does not need the free-will defense. Job's friends were most useful during the seven days they sat with him and said nothing (Job 2:13). Answer arguments with arguments. Answer wounds with presence.

The heart of it

Christianity never explains evil away, and never calls evil good. It answers with the crucified God who took the worst of it into himself and rose — and promises that in the end we will see, not just be told, how it was carried.

Objection two: science has disproved faith

This objection usually rests on a category mistake. Science asks how the natural world works: mechanisms, laws, causes within the universe. Faith asks a different order of question: why there is a universe at all, whether it means anything, and what the One who made it wants. The Catechism says the question of origins is enriched, not threatened, by discoveries about the cosmos and the development of life (CCC 283–284), and the Council defended the sciences' “rightful autonomy” (Gaudium et Spes 36).

The deeper point comes from Aquinas. God is not one cause among others inside the universe, competing with natural explanations for the same slots. He is the primary cause who gives being to everything, working through the natural causes he created (CCC 306–308). Discovering the mechanism no more evicts God than understanding the engine evicts the engineer. A “god” who only lived in the gaps of current science deserved to be evicted; the God of classical Christianity was never there.

The history tells the same story. The father of genetics, Gregor Mendel, was an Augustinian friar counting pea plants in a monastery garden. The expanding-universe theory that became the Big Bang was proposed by Fr. Georges Lemaître, a Catholic priest. The medieval Church built the universities that made modern science possible. On evolution: Catholics may accept it as an account of the body's development; the Church insists only that every soul is created directly by God — a claim no fossil addresses (Humani Generis 36; CCC 366).

Creation itself, Paul argues, was always meant to point beyond itself: “For the invisible things of him, from the creation of the world, are clearly seen, being understood by the things that are made” (Romans 1:20). Science reads the book of nature. Faith reads the signature.

Objection three: if God exists, why is he hidden?

This one deserves more respect than it usually gets, because Scripture raises it first: “Verily thou art a hidden God, the God of Israel the saviour” (Isaiah 45:15). If God wants to be known, why doesn't he make himself as undeniable as gravity?

Start with what an undeniable God would cost. Faith must be a free act — nobody can be forced into it (CCC 160) — because what God wants is not acknowledgment but love, and love cannot be extracted at gunpoint. A God who overwhelmed every mind would get compliance, not love. So he does something more respectful and more dangerous: he gives evidence sufficient for trust, not coercion. Pascal put it memorably — there is enough light for those who desire to see, and enough obscurity for those who don't.

Newman adds that most people who find God do not find him at the end of a syllogism anyway. They meet him first in conscience — that strange interior voice that praises and accuses us, carrying an authority we never gave it — which Newman read as the echo of a Person (Grammar of Assent). The arguments mostly clear the road for an encounter already underway.

And Christianity's central claim is precisely that God has acted against his own hiddenness: he “hath spoken to us by his Son” (Hebrews 1:2). God's definitive self-disclosure is Jesus Christ — which is why the honest half-believer's prayer in Mark remains the best a doubter can say: “I do believe, Lord: help my unbelief” (Mark 9:23–24). God answered that man. He did not scold him.

But is there any positive evidence?

Yes — if you let “evidence” mean what it means everywhere outside a laboratory. The demand for scientific proof of God quietly begs the question: God, if real, is not an object inside the universe for instruments to catch, but the reason there is a universe for instruments to exist in. You do not weigh the composer on the orchestra's scale.

The classical arguments reason from public facts anyone can check. Aquinas's Five Ways start from change, causation, the contingency of things, degrees of perfection, and the order of nature, and argue that each points to a necessary, unconditioned source of being that all men call God (Summa Theologiae I, q. 2, a. 3). The Catechism calls these “converging and convincing arguments” — from the world, and from the human person: the hunger for truth, the claim of conscience, the desire for an infinite happiness nothing finite satisfies (CCC 31–35).

Newman described how such reasoning actually produces certainty: not one knockdown proof, but many independent lines of evidence converging — the way you are certain about history and about the people you love. Nobody has laboratory proof that their mother loves them. They have something better suited to persons.

One honest admission: arguments alone rarely convert anyone, and the Church knows it. They remove roadblocks; grace does the rest. St. Augustine reasoned his way to the doorstep of the faith over years — while his mother Monica prayed him through the door. Both mattered. That is usually how it goes.

How to carry your own doubts

Newman drew a line every believer should memorize: “Ten thousand difficulties do not make one doubt” (Apologia Pro Vita Sua). A difficulty is an unanswered question — and a serious faith will always have some. Doubt is something else: a decision to stop trusting. You are allowed, and expected, to carry difficulties while remaining a believer, the way you carry unanswered questions about anyone you love.

If the questions have real weight for you, work them — but work them honestly:

  • Name the objection precisely. Vague unease grows in the dark. Write the question down in one sentence; a stated question can be investigated, a mood cannot.
  • Read the strongest version of both sides. Aquinas over memes — and the best skeptics too, not the loudest. The faith has survived better opponents than the internet.
  • Keep praying while you question. The father in Mark 9 believed and begged for help with his unbelief in the same sentence. Honest prayer from inside the struggle is the struggle done right.
  • Take it to a real priest. An article — this one included — can inform you; it cannot know you or accompany you. A living pastor can do both.
  • Give it time and practice, not just reading. Christianity is a life before it is a theory; it is fully tested only from inside — praying, worshiping, serving — like a friendship.

Where the argument ends

Apologetics has a modest job: to show that faith is reasonable, that the objections are answerable, and that the door is not locked. It cannot carry anyone through the door; grace and a decision do that, usually with other people involved.

If your questions are turning into a search, you don't have to resolve everything first. The Church has a room for inquirers where questions are the whole agenda, and you can explore it without committing to anything. Bring the problem of evil with you. The people worth talking to have felt its weight too.

Common Questions

What is the Catholic answer to the problem of evil?

The Church refuses quick answers (CCC 309). In outline: God created a free world journeying toward perfection; moral evil entered through creaturely freedom; God permits evil only because he can draw good from it, as the Cross proves — the worst evil ever committed became the world's redemption. Full understanding is promised only in heaven. Christianity's final answer to evil is not an argument but the crucified and risen Christ.

Does the Catholic Church accept evolution?

Catholics are free to accept evolution as an account of the development of the human body. Pius XII permitted the inquiry in Humani Generis (1950), and the Church holds that findings about the universe's age and life's development enrich rather than threaten faith (CCC 283). What the Church insists on is that each human soul is created directly by God — a claim no natural science addresses.

Is there any evidence that God exists?

Yes — philosophical evidence suited to the question. Aquinas's Five Ways argue from change, causation, contingency, perfection, and natural order to a necessary source of being. The Catechism calls these converging and convincing arguments, adding evidence from the human person: conscience, the hunger for truth, the desire for infinite happiness (CCC 31–35). It is certainty by convergence — like our certainty about history and persons — not laboratory proof.

Is doubting your faith a sin in the Catholic Church?

Having questions is not a sin. Newman distinguished difficulties — unanswered questions, which serious believers always carry — from doubt as a willful decision to stop trusting God. Involuntary difficulty is part of faith's normal growth; the Church warns only against deliberately cultivating disbelief. The honest response is to investigate the question, keep praying through it, and talk with a priest rather than letting it fester in silence.

Why doesn't God make his existence obvious?

Because faith must be free (CCC 160). An undeniable God would compel acknowledgment the way force compels compliance — but God wants love, which cannot be coerced. So he gives evidence sufficient for trust rather than proof that overwhelms: creation, conscience, and above all Jesus Christ, whom Christians hold to be God's definitive self-revelation.

Sources & Church Teaching

  • CCC 309–314 (the problem of evil and divine providence)
  • CCC 31–35 (ways of coming to know God)
  • CCC 156–160 (the motives and freedom of the act of faith)
  • CCC 283–285, 306–308 (creation, science, and secondary causes)
  • St. Thomas Aquinas, Summa Theologiae I, q. 2, a. 3 (the Five Ways; the objection from evil)
  • St. John Henry Newman, An Essay in Aid of a Grammar of Assent (1870); Apologia Pro Vita Sua (1864)
  • Second Vatican Council, Gaudium et Spes 36 (the rightful autonomy of the sciences)
  • Pius XII, Humani Generis 36 (evolution and the creation of the soul)
  • Genesis 50:20; Job 2:13; Isaiah 45:15; Mark 9:23–24; Romans 1:20; Hebrews 1:1–2; 1 Peter 3:15–16 (Douay-Rheims)

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The Scriptorium is written under the teaching personas of Ordo Digitalis and reviewed for fidelity to Catholic teaching, with sources cited above. How we work →

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