Does God Exist? — Evidence for the Sceptic
TypeApologetics Evidence Document
Use WhenSomeone gets stuck on Gospel Script Q1 — they say they don't believe in Heaven or God. This page gives you the evidence and arguments to use without getting into a lecture. Always ask questions rather than dump arguments.
The Goal
Your goal is not to win. It is to surface enough reasonable evidence that the person can no longer say belief in God is irrational — and then ask them: "Given that, what would a just God expect of you?"
Don't argue until you've asked: "Is this a conclusion you've thought about, or more of a default assumption?" Most people who say they don't believe in God have never seriously investigated the question.
Argument 1 — The Universe Had a Beginning (Cosmological Argument)
The core logic:
- Everything that begins to exist has a cause.
- The universe began to exist.
- Therefore, the universe has a cause outside itself.
The evidence for premise 2:
- Stars are consuming finite fuel. The sun burns through approximately 600 million tons of hydrogen every second. Every star in the universe is doing the same. If the universe were infinitely old, every star would have exhausted its fuel long ago — the night sky would be dark and cold. It isn't. The stars are still burning, which means they started burning at a finite point in the past. The universe had a beginning.
- The Second Law of Thermodynamics shows the universe is running down — total entropy (disorder) always increases in a closed system. If the universe were infinitely old, it would already have reached maximum entropy: uniform temperature, no usable energy, no structure, no stars, no life. It has not. Therefore it has not been running forever. It had a beginning.
- Even models designed to avoid a beginning require one. Cosmologists who attempt to construct cyclical, oscillating, or "eternally inflating" universes still find — mathematically — that any universe with net expansion cannot be extended infinitely into the past. Whatever mechanism one proposes for how the universe began, the convergent conclusion is that it did begin.
- Radioactive elements still exist. Uranium-238, thorium-232, and other primordial radioisotopes decay at fixed, measurable rates into stable end-products. If the universe were infinitely old, every radioactive element would have long since decayed to completion — none would remain. The continued abundance of these isotopes throughout the universe is direct, measurable evidence that it has not been running forever.
- Earth's magnetic field is measurably decaying — and the numbers are devastating for an old Earth. Direct measurements going back to Carl Friedrich Gauss in 1835 show the Earth's magnetic field is steadily losing strength, halving roughly every 1,400 years. Creationist physicist Dr. Russell Humphreys modelled the ohmic decay of the electrical currents in the Earth's core that generate the field and showed that projecting the decay rate backward, the field would have been physically impossible to sustain much beyond 10,000 years ago — placing a hard upper limit on the Earth's age. An Earth billions of years old cannot have the magnetic field it has. Humphreys' model also made predictive claims about the magnetic fields of Uranus and Neptune before the Voyager 2 flyby — and his predictions proved significantly more accurate than those of secular models, which is the standard test of a good scientific theory.
- "Quantum fluctuation from nothing" is not actually nothing. The most common secular counter-argument is that the universe "fluctuated" into existence from a quantum vacuum. But a quantum vacuum is not nothing — it is a seething field of energy operating under pre-existing physical laws, in pre-existing space and time. The question is not answered; it is pushed back one step. Where did the quantum vacuum come from? Where did the laws of physics come from? Stephen Hawking claimed in The Grand Design that "because there is a law such as gravity, the universe can and will create itself from nothing." Oxford mathematician John Lennox's response was precise: "Nonsense remains nonsense, even when talked by world-famous scientists. The law of gravity is not nothing — it is something, and it requires an explanation just as much as the universe does." At some point you reach a true beginning — a state before space, time, matter, and physical law — and at that point, science has nothing left to say. That is precisely where the argument for a transcendent Creator is strongest.
What this cause must be:
If the cause of space and time cannot itself be inside space and time, it must be:
- Timeless (not in time)
- Spaceless (not in space)
- Immaterial (not made of matter)
- Enormously powerful (able to produce everything from nothing)
- Personal (the only way to explain a choice to begin — an impersonal mechanism cannot select one moment over another)
That is a description of what theists call God.
"A universe that begins to exist requires a transcendent cause — one that is spaceless, timeless, immaterial, and enormously powerful." — William Lane Craig, Reasonable Faith
Argument 2 — The Universe Is Fine-Tuned for Life (Teleological Argument)
The physical constants of the universe are set to astonishing precision. Change any of them even slightly and no stars, planets, chemistry, or life would exist.
| Constant | If changed by... | Result |
|---|---|---|
| Gravitational constant | 1 part in 10⁶⁰ | No stars (collapse or expansion) |
| Cosmological constant (dark energy) | 1 part in 10¹²⁰ | Universe either collapses instantly or flies apart |
| Strong nuclear force | 2% stronger | No hydrogen; no stars |
| Strong nuclear force | 2% weaker | No heavy elements; no chemistry |
| Ratio of electrons to protons | 1 part in 10³⁷ | No stable atoms |
Physicist Roger Penrose calculated the probability of our particular low-entropy universe arising by chance at 1 in 10^(10^123) — a number so large it is physically meaningless as a probability.
Common objection: "The multiverse explains this — we just happen to be in a life-permitting universe."
Response: Even granting a multiverse, the multiverse itself requires fine-tuned laws to produce any universes at all. You haven't eliminated design — you've pushed it back one level. And a multiverse is not observable or falsifiable — it takes more faith than God.
The information argument — DNA as language:
Fine-tuning applies not just to physical constants but to biological information. DNA is not merely a molecule with a chemical pattern — it is a language. It has an alphabet (four nucleotide bases), words (codons), sentences (genes), and meaning (instructions for building proteins). The information content of a single human cell exceeds the entire Encyclopedia Britannica.
Here is the critical point: in all of human experience, information of this kind — specified, complex, functional language — has only ever been observed to come from one source: a mind. You have never seen a language write itself. John Lennox puts it sharply:
"The more we learn about the cell, the more it looks like a city, not a crystal. Cities are built by minds. The information in DNA points to an author."
The challenge to the atheist is simple: "Show me one example in nature of functional, specified information arising from a purely physical process with no intelligence involved." No such example exists.
"The fine-tuning of the universe is genuinely in need of explanation. And the best explanation is an intelligent designer." — Robin Collins, physicist
Argument 3 — Objective Moral Facts Require God (Moral Argument)
The core logic:
- If God does not exist, objective moral values do not exist.
- Objective moral values do exist.
- Therefore, God exists.
Defending premise 2:
Almost no one actually lives as if morality is purely subjective. When someone says, "What Hitler did was wrong," they don't mean "I personally dislike it" — they mean it was actually wrong, regardless of what Nazi Germany believed.
Torturing children for fun is not merely unpopular — it is evil. That's a moral claim that carries objective weight. Where does that weight come from?
- On atheism, moral values are just evolved preferences — no more objectively "right" than preferring chocolate over vanilla.
- On theism, God's nature is the standard of goodness itself. What he commands flows from what he is.
The sceptic's dilemma: If you want to call anything truly evil — genocide, child abuse, injustice — you need an objective standard. Atheism cannot provide one. The moment you say, "That's genuinely wrong," you are borrowing from a theistic framework.
Argument 4 — The Historical Evidence for Jesus
Even if someone is agnostic about God in the abstract, the historical Jesus is a separate question. Virtually all historians — secular and Christian — agree on the following minimal facts:
- Jesus existed and was crucified under Pontius Pilate (confirmed by Tacitus, Josephus, the Talmud, and all major historians).
- The tomb was empty three days later (this was never disputed by the Jewish authorities — they claimed the disciples stole the body, which concedes the tomb was empty).
- Eyewitnesses claimed to see him alive — not one person, but groups of hundreds (1 Corinthians 15:3–8, written within 20–25 years of the event, contains eyewitness testimony Paul gathered firsthand).
- The disciples were radically transformed — from hiding in fear to willingly dying for their claim that Jesus rose. People die for things they believe to be true; they don't die for something they know is a lie.
The question: What best explains all these facts together?
- Hallucination? Group hallucinations are not a clinical phenomenon. And hallucinations don't leave empty tombs.
- Legend? The letters of Paul date to within 20 years of the crucifixion — too early for legend.
- Deliberate lie? Why would the disciples invent a story that got them killed, with nothing to gain?
- Resurrection? It explains all the data.
"After his suffering, he presented himself to them and gave many convincing proofs that he was alive." — Acts 1:3
"He appeared to Cephas, then to the twelve. Then he appeared to more than five hundred brothers at one time, most of whom are still alive." — 1 Corinthians 15:5–6
Argument 5 — The Transcendental Argument (Presuppositionalism)
This argument does not add one more piece of evidence to the pile. It operates at a deeper level: it shows that the atheist's ability to argue at all depends on a theistic foundation being true.
The core challenge:
Every argument the atheist makes against God — whether from science, logic, or reason — relies on three things:
- The laws of logic (e.g. the law of non-contradiction: a thing cannot be both true and false at the same time)
- The uniformity of nature (the assumption that the future will resemble the past, that physical laws hold consistently everywhere — without which science is impossible)
- The reliability of human reasoning (the assumption that our minds, when functioning correctly, can arrive at true conclusions)
The problem for atheism:
If atheism is true — if the universe is the product of blind, undirected, purposeless physical processes, and human beings are the accidental byproduct of those processes — then there is no reason whatsoever to trust human reasoning.
A brain produced by natural selection was shaped to survive and reproduce, not to think truly. Evolution has no mechanism for selecting correct reasoning — only for selecting behaviour that keeps the organism alive long enough to pass on genes. As C.S. Lewis put it:
"If my mental processes are determined wholly by the motions of atoms in my brain, I have no reason to suppose that my beliefs are true… and hence I have no reason for supposing my brain to be composed of atoms."
Charles Darwin himself felt the force of this. He wrote in a private letter: "The horrid doubt always arises whether the convictions of man's mind, which has been developed from the mind of the lower animals, are of any value or at all trustworthy."
Philosopher Alvin Plantinga developed this into a formal argument — the Evolutionary Argument Against Naturalism (EAAN): if naturalistic evolution is true, the probability that our cognitive faculties produce mostly true beliefs is either low or inscrutable. Therefore belief in naturalistic evolution defeats itself — a mind produced by it has no reliable basis for trusting its own conclusions, including its conclusion that naturalistic evolution is true.
The application:
When an atheist uses logic to argue against God, ask:
"On your worldview, your brain is the product of blind physical processes that selected for survival, not for truth. Why should I — or you — trust the conclusions it reaches? What makes your reasoning reliable?"
They cannot answer this from within their own worldview. To justify reason, logic, and science, they must borrow the Christian answer: that the universe was created by a rational God who made human minds capable of understanding it (Genesis 1:27; John 1:1 — the Logos who is both the rational principle behind creation and the one in whose image we are made).
John Lennox — an Oxford professor of mathematics — adds a pointed observation here. Physicist Eugene Wigner famously noted "the unreasonable effectiveness of mathematics": abstract mathematical structures, invented inside human minds, turn out to describe physical reality with perfect precision. There is no reason this should be so on atheism — a universe of blind chance producing minds of blind chance has no mechanism to ensure they correspond. But if both the rational structure of the universe and the rational capacity of the human mind share a common origin in a rational Creator, the correspondence is exactly what you would expect. As Lennox puts it: "If you believe in science, you already believe in the preconditions of science — and those preconditions point to God."
A further point from Lennox that disarms a common deflection: explaining the mechanism of something does not explain it away. If someone tells you a book was produced by ink, paper, and a printing press, that is a true account of the mechanism — but it says nothing about whether there was an author. Science explains how the universe works; it cannot, by its own methods, answer why it exists or who is responsible. The atheist who says "science explains everything" has confused the tool with the answer.
This is not an argument that the atheist is stupid. It is an argument that atheism, if consistently followed through, undermines the very ground on which all arguments — including arguments for atheism — must stand. The atheist is, as Cornelius Van Til put it, like a child sitting on her father's lap to slap his face. She can only do what she is doing because of what she is denying.
In practice — how to use this:
You do not need to use the formal term "presuppositionalism." Simply ask:
- "You're using logic to argue there is no God. Where do the laws of logic come from? Are they material — can you weigh them or put them in a test tube?"
- "If your brain was shaped by blind evolution to survive, not to think truly — why trust it?"
- "Science assumes the universe is orderly and rational. Why should a universe that produced itself by accident be orderly? Why should it obey laws at all?"
The goal is not to win on points. It is to show that reason itself, consistently applied, points beyond the material world to a rational Creator — and that the atheist is living on borrowed capital from a worldview they are rejecting.
"The fear of the LORD is the beginning of wisdom." — Proverbs 9:10
"In him are hidden all the treasures of wisdom and knowledge." — Colossians 2:3
"In the beginning was the Word [Logos] — and the Word was God." — John 1:1
Argument 6 — Evidence from the Created World: Challenges to Deep Time
The arguments above establish that the universe had a cause and a beginning. This section presses further: the physical world contains multiple independent lines of evidence that the creation is far younger than the secular consensus claims — and that the global flood of Genesis 6–8 is the most coherent explanation for what we observe in the fossil and geological record. These are not fringe claims; they are measurable, documented, and increasingly difficult for conventional science to dismiss.
Carbon-14 Where It Should Not Exist
Carbon-14 is a radioactive isotope with a half-life of approximately 5,730 years. After roughly 100,000 years, it decays to levels undetectable by any instrument. It should be completely absent from anything older than that.
Yet measurable, consistent Carbon-14 has been found in:
- Coal seams dated by conventional methods to 300+ million years old
- Diamonds dated to 1–3 billion years old
- Dinosaur bones dated to 65+ million years old
The RATE project (Institute for Creation Research) and Answers in Genesis documented this across dozens of independent samples from different geological formations. No known contamination mechanism can account for consistent C-14 readings across these materially distinct samples. The only straightforward explanation is that these materials are not nearly as old as claimed.
"For in six days the LORD made heaven and earth, the sea, and all that is in them, and rested on the seventh day." — Exodus 20:11
Soft Tissue in Dinosaur Bones
In 2005, secular paleontologist Dr. Mary Schweitzer (Montana State University) published findings of flexible soft tissue, intact blood vessels, intact proteins, and collagen inside a T. rex femur said to be 68 million years old. The discovery was initially dismissed by the scientific establishment as contamination or biofilm. Subsequent research replicated the findings across multiple dinosaur specimens from different sites.
The problem is simple and devastating: no known chemistry — under any realistic preservation conditions — can maintain soft tissue, flexible blood vessels, and intact proteins for tens of millions of years. The biochemical decay rates make it impossible. The evidence is consistent with burial a few thousand years ago. Secular science has produced no satisfactory mechanism to explain it. The global flood of Genesis, burying creatures rapidly in sediment roughly 4,000–5,000 years ago, is a coherent account of what we find.
This is not an isolated discovery. A maintained bibliography of over 116 peer-reviewed secular journal papers documenting surviving biological material in fossils is available at bflist.rsr.org — compiled by Dr Brian Thomas (Ph.D. paleobiochemistry). These are not creationist papers; they are the secular scientific literature itself, reporting what they found and struggling to explain it.
Genetic Entropy — The Genome Is Decaying, Not Improving
Dr. John Sanford — Cornell University geneticist and co-inventor of the gene gun (biolistics) — spent decades as an evolutionist before his own research reversed his position. In Genetic Entropy and the Mystery of the Genome (2005), he demonstrated mathematically that the human genome is accumulating harmful mutations at a rate far exceeding natural selection's ability to remove them.
This is not a philosophical argument — it is based on empirically measured mutation rates. The genome is in net decline. The implications are fatal for the evolutionary account:
- If the genome is deteriorating, it cannot have been building up complex, functional information over millions of years.
- It must have started with high information content and low mutational load.
- That starting point is exactly what biblical creation describes.
Sanford's research has been published in peer-reviewed scientific literature and presented at international genetics conferences. His later work with the Mendel's Accountant simulation modelled population genetics and confirmed the same conclusion: genomes degrade; they do not self-construct.
"So God created man in his own image, in the image of God he created him; male and female he created them." — Genesis 1:27
Polystrate Fossils — Trees Buried Through Millions of Years?
Polystrate fossils are fossils — most commonly upright tree trunks — that pass through multiple rock layers conventionally said to represent millions of years of slow, gradual deposition. They are found on every continent.
The problem: if those strata formed over millions of years, the tree would have completely decomposed long before being covered. Wood does not remain intact for even thousands of years at the surface. These trees are standing upright, undecayed, cutting through what secular geology says is deep time.
The only coherent explanation is that the rock layers were deposited rapidly — in a single catastrophic event. The biblical flood is that event.
The Fossil Record and the Global Flood
The fossil and geological record globally bears the hallmarks of rapid, catastrophic burial on a massive scale:
- Marine fossils on every mountain range on Earth — including the Himalayas, the Rockies, and the rim of the Grand Canyon. Sea creatures at the highest points of the continents. This is not what slow, uniform geological processes produce.
- The Tapeats Sandstone stretches across most of North America as a single, continuous sedimentary layer. For a uniform horizontal layer of this scale to exist, it had to be deposited rapidly under high-energy water action over a vast area simultaneously. Slow, local processes cannot produce continental-scale uniformity.
- Billions of creatures buried in rock layers worldwide, in positions and conditions consistent with sudden, catastrophic burial — not gradual accumulation over ages. Soft-bodied organisms do not fossilise under normal conditions; they decompose. Fossilisation requires rapid burial under pressure. The fossil record is itself evidence of catastrophe.
Genesis 6–8 describes exactly the kind of global, high-energy, rapid-burial event that the physical evidence demands.
"In the six hundredth year of Noah's life… all the fountains of the great deep burst forth, and the windows of the heavens were opened." — Genesis 7:11
"And the waters prevailed so mightily on the earth that all the high mountains under the whole heaven were covered." — Genesis 7:19
How to Use This in Conversation
Don't dump the whole page. Pick one argument based on what the person seems to care about:
- Scientifically minded? Use the Cosmological argument — stars consuming fuel and the Second Law are the most accessible entry points. Or use Fine-Tuning.
- Morally minded? Use the Moral Argument — "Where does your sense of justice come from?"
- Historical sceptic? Use the minimal facts about Jesus.
- Philosophically minded or confident in reason/logic? Use the Transcendental Argument — "On your worldview, why trust your own reasoning?"
- Challenges secular timelines? Use C-14 in coal and diamonds, soft tissue in dinosaur bones, or polystrate fossils — all are measurable, documented, and hard to dismiss.
The key transition question:
"Suppose God does exist — and he is perfectly just. What do you think he would expect from the people he created?"
This moves the conversation from Does God exist? to Am I accountable to him? — which is where Q2 of the gospel script begins.
A Note on Sources
The thinkers and resources referenced on this page are cited because they make arguments that are useful and often compelling — not as blanket endorsements of every position they hold. We are commanded to test all things and hold fast to what is good (1 Thessalonians 5:21), and that applies to Christian scholars as much as anyone else.
Specifically: William Lane Craig makes strong contributions to the Cosmological and Fine-Tuning arguments, but he accepts the Big Bang and an old universe. This site's author holds to biblical creation and does not share that position. Use Craig's logic on the cause of the beginning; do not assume his cosmological framework is adopted here.
Similarly: John Lennox is an Oxford mathematician and one of the most effective Christian communicators engaging atheism today — his responses to Dawkins, Hawking, and Krauss are sharp and worth knowing. However, Lennox also holds an old-earth position and does not interpret Genesis 1 as a literal six-day creation. His arguments on information, the incoherence of "nothing," the intelligibility of the universe, and the mechanism/agency distinction are used here on their own merits — his views on the age of the earth are not.
The same principle applies throughout: borrow what is sound, test what is claimed, and anchor everything in Scripture.
Resources for Further Study
- William Lane Craig — reasonablefaith.org (strong on cosmological and fine-tuning arguments; note: accepts old-earth/Big Bang cosmology)
- John Lennox — God's Undertaker: Has Science Buried God?; God and Stephen Hawking; Gunning for God (exceptional on information, mechanism vs. agency, and responding to Hawking/Dawkins/Krauss; note: holds old-earth position)
- Mere Christianity — C.S. Lewis (especially Part 1, the argument from reason)
- The Case for Christ — Lee Strobel
- Cold-Case Christianity — J. Warner Wallace
- Greg Bahnsen — Always Ready (presuppositional apologetics)
- Cornelius Van Til — The Defense of the Faith
- Alvin Plantinga — Warrant and Proper Function (Evolutionary Argument Against Naturalism)
- Dr. Russell Humphreys — Starlight and Time; magnetic field research (biblical creationist cosmology)
- Institute for Creation Research — icr.org (RATE project — C-14 and radiometric dating research)
- Answers in Genesis — answersingenesis.org (peer-reviewed Answers Research Journal; fossil, geology, and genomics research)
- Creation Ministries International — creation.com
- 101 Evidences for a Young Age of the Earth and the Cosmos — Dr Don Batten — creation.com/age-of-the-earth (comprehensive reference covering biological, geological, astronomical, and physical evidence; a go-to resource)
- List of Biomaterial Fossil Papers — Dr Brian Thomas (Ph.D. paleobiochemistry, U. of Liverpool / ICR) — bflist.rsr.org (a maintained, peer-reviewed bibliography of 116+ papers documenting surviving soft tissue, proteins, DNA, and biological structures in fossils supposedly millions of years old — the secular scientific literature itself, not creationist commentary)
- Dr. John Sanford — Genetic Entropy and the Mystery of the Genome (genome decay; peer-reviewed genetics)
- Dr. Mary Schweitzer — original soft tissue research (secular source; the findings, not the interpretation)
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