Start with the simplest observation you can make: things exist. You exist. The chair you are sitting on exists. The atoms composing it exist. The universe in which those atoms move and interact exists. The observation is so obvious it barely seems worth stating.
Here is the question philosophers have wrestled with for as long as they have been asking questions at all: why? Why does anything exist? What accounts for the fact that there is something rather than nothing?
The brute fact answer
The most common response from people who have not thought about it carefully is to say that the universe just exists, that its existence requires no explanation, that it is simply a brute fact. Everything stops with the universe. There is nothing more to say.
The answer has a surface plausibility. Every chain of explanations has to stop somewhere. You cannot explain everything in terms of something else indefinitely. At some point, you reach bedrock.
Notice what this answer actually claims. It claims that the universe (this specific, enormously complex, finely calibrated arrangement of matter and energy that began at a finite point in time) requires no explanation. That it just is. That the question “why does it exist rather than not exist?” has no answer, because there is nothing to find.
The claim is a strong one. Stronger, in some ways, than the theistic answer it is meant to replace. The theist says the universe exists because something caused it. The brute-fact atheist says the universe exists for no reason at all, that existence with all its specificity and structure is simply given, uncaused, unexplained.
The Quran’s framing of the question
The same question the cosmological argument poses in philosophical terms is posed in the Quran in direct rhetorical form, fourteen centuries ago, addressed to anyone who has thought about it carefully:
The verse poses the trilemma in terms a contemporary philosopher of religion would recognise. Either things came from nothing (which violates a principle so basic that abandoning it collapses science along with theology), or they created themselves (which is incoherent, since a thing has to exist to do any creating, including its own), or some other being created them. The Quran takes the third branch as forced, the first two having been ruled out. The position the verse describes the unbeliever as occupying (“rather, they have no certain conviction”) is the same brute-fact position contemporary atheism falls into when pressed on the origin of existence.
What explanation requires
The principle that things which begin to exist have causes is the methodological foundation of all science and rational inquiry. When scientists investigate a phenomenon (a disease outbreak, a geological formation, a particle interaction) they do not say “it just happened.” They look for causes. The principle of sufficient reason, that things have explanations for why they are the way they are rather than otherwise, is what makes inquiry possible at all.
Applying the principle to the universe itself is consistency, not special pleading. The universe began to exist; this is now established by cosmology, not just philosophy. If things that begin to exist require causes, then the universe requires a cause. The cause of the universe must be outside the universe, since the universe includes all matter, energy, space, and time. Whatever caused the universe is therefore non-physical, non-spatial, non-temporal, and enormously powerful.
The regress problem
The standard objection is immediate: if everything requires a cause, what caused God? The objection sounds powerful but rests on a misunderstanding of the argument. The argument is not that everything requires a cause. The argument is that everything that begins to exist requires a cause. An eternal being, one that has no beginning, requires no cause, precisely because there is no moment of its coming into existence that requires explanation.
The choice is between an uncaused eternal universe and an uncaused eternal God. Both options terminate the regress. The question is which option better explains the observed data: a universe that had a beginning, that operates according to rational laws, that is calibrated for conscious life, and in which conscious beings find themselves capable of asking these questions.
Why the universe cannot be eternal
The proposal of an eternal universe was once a serious option. The proposal is now very difficult to maintain. The evidence from cosmology (the expansion of the universe traced backward, the cosmic background radiation, the second law of thermodynamics applied to an infinite past) converges on the conclusion that the universe had a beginning. An eternal universe would have already reached maximum entropy. It has not. The universe therefore had a beginning.
An eternal multiverse faces similar problems. Any infinite regress of physical causes remains within the physical order. The regress does not escape the need for a first cause that is itself outside that order. Pushing the beginning back does not eliminate it. Pushing the beginning back moves the question.
The God of self-subsistence
The classical theistic position requires not only that something caused the universe but that the cause is itself self-subsistent: existing without dependence on anything else. The Quran identifies this attribute directly:
The two names paired here, al-Ḥayy (the Ever-Living) and al-Qayyūm (the Self-Subsisting Sustainer of all that is), capture the philosophical requirement exactly. The cause of contingent existence cannot itself be contingent without simply relocating the question. The cause must be of a different kind: one whose existence is not received from anything else, who depends on nothing, and on whom everything else depends. The Islamic tradition’s name for this kind of being is the same conclusion the cosmological argument reaches.
The logic of the demand for explanation
Consider what the brute-fact position commits you to. If the universe requires no explanation, then the principle underlying every scientific investigation quietly collapses. Science operates on the assumption that things happen for reasons, that events have causes, that the universe is intelligible. Strip out that assumption and you do not get a more modest worldview. You get one in which no explanation of anything is required, because the same move that exempts the universe from explanation can be made for any phenomenon at all.
There are only two honest positions. Either the universe has an explanation for its existence, or it is an inexplicable brute fact. If you take the second, you are entitled to demand no further explanations about anything; the entire enterprise of rational enquiry rests on borrowed ground. If you take the first, you need an explanation that does not itself require a further explanation: something that exists necessarily, whose non-existence is not merely unlikely but impossible. That is exactly what classical theism has always meant by God. The argument does not require elaborate theology. The argument requires only that you take the demand for explanation seriously, the same demand that makes every branch of science and philosophy possible in the first place. The simple assertion that “the universe just exists” does not adequately meet that demand.
Where the argument leads
Taken together, these arguments point to more than a distant higher power. They point to a reality in which the world is ordered, reason can be trusted, and human life stands under real moral claim. The move from generic theism to Islam is therefore a further step toward the most coherent account of the One behind everything, beginning with the recognition that the cause of the universe must be self-subsistent in exactly the way the Quran describes.