Duality and the Problem of Evil
May. 26th, 2026 02:57 pmGood and evil are among the oldest conceptual opposites in human thought, and for much of history, they have been understood as two sides of the same coin. But for many thinkers, theologians, and ordinary believers, this duality presents something more troubling than a philosophical puzzle. It presents what may be the single most serious challenge to religious faith: the problem of evil.
The question, at its core, is very simple. If God is all-powerful and all-good, why does suffering exist?
The argument was given its sharpest formulation by the ancient Greek philosopher Epicurus and later popularized by David Hume, it draws its force from a clean logical contradiction. Three claims are commonly attributed to a classical conception of God, and the problem is that all three cannot simultaneously be true:

- If God wants to eliminate evil but cannot, He is not all-powerful, He is impotent.
- If God can eliminate evil but chooses not to, He is not all-good, He is indifferent, or worse, malevolent.
- If God is both able and willing to end evil, then evil should not exist. And yet, it does.
- You can hold any two of these claims together without contradiction. But you cannot insist on holding the three of them.
Before any serious attempt to resolve this dilemma, it helps to draw a distinction that is often collapsed in popular debate. Evil is not a single category. Theologians and philosophers have long identified two fundamentally different types, each posing its own challenge and requiring its own response.
Moral evil refers to suffering that arises from the deliberate choices, actions, or negligence of free-willed creatures. War, murder, cruelty, theft, systemic injustice. The standard theological response here is the free will defense: a world in which rational beings can choose good or evil, and bear genuine moral responsibility for that choice, is inherently more valuable and meaningful than a world of morally inert automata who can only do good because they have no other option. The capacity for evil, in this view, is the price of genuine freedom, and genuine freedom is worth paying for.
Natural evil is considerably harder to dismiss. Earthquakes. Tsunamis. Cancer. Viral pandemics. The suffering caused by the indifferent physical world that has nothing to do with human choice. No act of will summoned the Black Death or triggered the Lisbon earthquake. This forces a deeper and more uncomfortable question: Why did an all-powerful Creator design a physical ecosystem that relies on destruction and disease to function? Why does the natural order seem not merely indifferent to suffering, but structurally dependent on it?
Among the many attempts to answer this question, one stands out for the clarity and depth of its logical structure: the argument that evil is not a created thing at all, but a structural inevitability cast by the very existence of good.
To understand this, we have to consider the mechanics of creation itself. For any quality to manifest meaningfully, its structural opposite must exist as a conceptual possibility. This appears to be a fundamental feature of how existence works. You cannot know warmth without the reference point of cold. You cannot perceive motion without stillness. You cannot recognize courage without the possibility of cowardice.
We can see this at work in the very opening of Genesis:
"God saw that the light was good, and God separated the light from the darkness."
Notice what the text does not say. It does not say God created darkness. Darkness appears in Genesis 1:2 not as a crafted thing but as the formless void, the undifferentiated nothingness that precedes creation (tohu va-vohu). When God speaks light into existence, darkness is redefined. It ceases to be mere background and becomes, structurally, the absence of light. Light asserts itself as form and order, darkness is simply what remains where light is not.
From an experiential standpoint, darkness feels entirely real. You can feel it close around you. Yet physically and philosophically, it has no independent substance whatsoever. It is not a thing. It is a measurable absence of photons.
This logic extends far beyond the physical and maps directly onto the attributes of the divine. Consider some of the classical theological characteristics of God:
- Infinitude and Finitude: God is inherently infinite, yet finitude pervades the universe.
- Omniscience and Ignorance: God is all-knowing, yet ignorance is the baseline condition of created minds.
In neither case does the negative quality exist as an independent substance or rival force. Finitude is not a power opposing infinitude, it is simply what it looks like to not be infinite. Ignorance is not a rival to omniscience, it is what it looks like to not know. These apparent opposites are not symmetrical. One is the positive, active attribute. The other is its shadow. In every one of these cases, the "evil" isn't something imported from outside. It's a failure of the same order that, at the macro level, holds everything together. A tax, you might say, levied by the very physical and biological laws that make a universe capable of hosting life and consciousness.
This points toward something philosophically significant: duality may not be a rule that God designed for creation and could theoretically have designed otherwise. It may be an intrinsic structural feature of existence itself, one that applies even to the nature of the divine, insofar as the divine can be comprehended at all. For a quality to hold meaning, its absence must remain a conceivable reality.
This insight runs through several mystical and philosophical beliefs. Process theology grapples seriously with the question of how an infinite God relates to a finite world. The Kabbalistic concept of tzimtzum, literally, "contraction", proposes that God voluntarily withdrew or contracted His infinite presence in order to make conceptual and ontological space for something other than Himself to exist. If God is truly infinite, filling all of reality, there is no room for a world, no room for otherness, no room for you or me. Creation requires a kind of self-limitation. The finite world exists not despite God's infinity, but because of a deliberate self-withdrawal that makes room for finitude. The same structural logic applies here. If God is infinite, then by the law of duality that governs existence, finitude must exist. If God is, then there must also be, in some sense, not-God, something bounded, dependent, contingent.
What's striking is that modern physics arrived at the same structural conclusion through a completely different path, and without anyone intending it.
In 1928, Paul Dirac was trying to write a relativistic equation for the electron. The problem was what it kept spitting out: for every solution describing a real particle with positive energy, there was an other solution, a particle with negative energy, identical in mass but opposite in charge. A mirror image. Dirac didn't want this answer. Neither did anyone else. Then in 1932, Carl Anderson caught exactly that particle in a cloud chamber and called it the positron. Dirac hadn't made an error. He'd accidentally derived the necessity of antimatter from pure mathematics.

When Anderson looked into the cloud chamber, he didn't just find a new particle; he found a ghost made manifest. He observed a track that curved under a magnetic field in a direction that defied the known electron, yet carried its exact footprint.
It turns out antimatter is baked into the structure of reality. Every particle has an antiparticle, the electron its positron, the proton its antiproton, the neutron its antineutron. They're paired by definition, each one the structural negative of the other.
Which brings us to one of the deepest unsolved problems in all of physics. According to the standard model, the Big Bang should have produced matter and antimatter in perfectly equal quantities. Equal and opposite, by the laws of symmetry. And if that balance had held, if the symmetry had been perfect, every particle would have found its antiparticle and they'd have annihilated each other in a blaze of pure energy. What's left? A featureless universe of light, with no stars, no chemistry, no observers wondering why anything exists at all. So we're here because that symmetry cracked. In the first fractions of a second after the Big Bang, for reasons physics still hasn't fully explained, matter edged ahead. Roughly one billion and one matter particles for every billion antimatter particles. The matched pairs wiped each other out. That single extra particle survived. Multiply that infinitesimal asymmetry across the entire early universe, and you get every atom that has ever existed, every star, every planet, every cell, every person.
So in other words, the world was built from an imbalance. And existence is the residue of a broken symmetry.
Now hold that thought alongside what we've been arguing. Theology holds that God is the ground of being. Physics tells us that at the moment of creation, the cosmos was immediately and necessarily split into matter and its mirror opposite. God separated the light from the darkness, the first act of the universe was division, a differentiation of positive from negative, of being from its own absence.
This isn't a claim that Genesis is a physics textbook, or that Dirac had mystical leanings, or that the matter-antimatter asymmetry literally maps onto the problem of evil. The parallel is structural, not literal. But the structure holds remarkably well across both domains. In physics, you cannot write down the equations for a particle without simultaneously generating its antiparticle. The negative isn't added on afterward, it's intrinsic to the positive. The theological parallel is exact, evil isn't a substance God fashioned alongside goodness, or some rival power built and set loose in the world. On the privation account, evil is the antiparticle of good. The shape that takes existence wherever good, wherever God, is absent or refused. Just as antimatter is defined entirely by its relationship to matter, evil has no independent content of its own. It is the necessary mirror of a positive reality, meaningful only in relation to what it lacks.
And just as this universe only became possible because matter and antimatter separated, because the symmetry broke, because differentiation happened, the world of moral and spiritual experience depends on the same kind of distinction. A universe of uniform, undifferentiated good, with no possibility of its absence, would be as experientially empty as one in which matter and antimatter cancelled perfectly.
When we bring this framework to bear on the problem of evil, the dilemma begins to look different.
Theology holds that God is not merely good but that goodness is His fundamental nature, the ground of His being, not simply one attribute among others. If goodness is what God is, then its absence must exist as an experiential reality within any created order. Evil, on this account, is not a created entity. It has no independent metaphysical substance and no creative source of its own. Just as darkness is the absence of light and ignorance is the absence of knowledge, evil is the privation of good, the experiential reality of what it looks like when goodness is absent or rejected. It is not a rival force competing with the divine on equal footing. It is, rather, the inevitable shape cast by the shadow of a Good that is real.
This does not make evil trivial, or suffering less acute, or the questions it raises less important. It does, however, reframe the problem. The existence of evil no longer requires us to posit either a weak God or a malevolent one. It asks us instead to reconsider what it means for a good and infinite God to create anything at all, and to recognize that the very act of creation, of bringing something finite and free into being, necessarily opens a space in which the absence of good becomes possible.