Anselm

Chapter 1

Faith seeking understanding

"If any man, either from ignorance or unbelief, has no knowledge of the existence of one Nature which is the highest of all existing beings … let him try to teach himself … by reason alone."

He was born in 1033 at Aosta, an Alpine town in the borderland between what is now Italy and France, in the Kingdom of Burgundy. The family was minor nobility, and the standard description of him as "Italian-born" points at that Aosta beginning. As a young man he left home after a falling-out with his father and wandered across the Alps and through France for several years before the road delivered him to the place that would make him: the Abbey of Bec, a Benedictine monastery in Normandy (a Benedictine is a monk living under the Rule of Saint Benedict, the old monastic pattern of stability, prayer, and shared property).

What drew him to Bec was a teacher. Lanfranc, the abbey's prior, was the most famous scholar in Normandy, and Anselm came to study under him and stayed to take the habit, entering the monastery around 1060, in his late twenties. The rise was steady and fast. When Lanfranc moved on, Anselm became prior of Bec in 1063, and abbot in 1078. For roughly three decades the abstract, contemplative work that is his real legacy was done here, in a Norman cloister, by a monk who would much rather have been left alone with it.

The conviction under everything he wrote is captured in three Latin words that began as the title of one of his books and ended as the name of his whole method: fides quaerens intellectum, faith seeking understanding. The order of those words is the entire point. Faith is the starting position, not the finish line. A person believes the Christian things first, on trust, and only then turns reason loose on them, not to decide whether to believe but to understand what is already believed. This is Augustine's crede ut intelligas (believe in order to understand; era 2, chapter 1) taken up directly. Reason does not stand outside the faith as a judge deciding whether to let it in. Reason works inside the faith as an explorer mapping country the believer already lives in.

The radical part is how far Anselm trusted that exploration to go. He set himself a hard test in the Monologium (written around 1076), an extended argument for God that refuses, on purpose, to lean on a single line of scripture. The aim was to show what reason can reach on its own legs: that there exists one highest Nature, the best and greatest of all beings, the source from which everything else has its being, and to reach it by argument alone, the way the epigraph proposes, by a man teaching himself "by reason alone." A monk writing for fellow monks did not need to prove God to them from scratch; they already believed. Holding scripture back was a demonstration. It showed that the faith they held could also be reached, or at least approached, by the unaided mind, and that doing so was a form of worship rather than a threat to it.

Anselm pushed the Monologium method as far as a chain of arguments will go, and then he grew dissatisfied with it for a precise reason: it took many steps. Each argument leaned on the one before, and the whole structure was only as strong as its longest chain. He wanted a single argument, one self-contained line of reasoning that would establish God's existence in one stroke and need nothing propping it from outside. By his own account he became almost obsessed with finding it, turned it over for days, tried to put it out of his mind as a distraction from prayer, and then it came. The result was the Proslogium, and its first title was the program itself: Fides quaerens intellectum.

Chapter 2

The argument that looks at nothing

"And assuredly that, than which nothing greater can be conceived, cannot exist in the understanding alone. For, suppose it exists in the understanding alone: then it can be conceived to exist in reality; which is greater."

The single argument Anselm found is the most famous sentence-machine in medieval philosophy, and centuries later Kant would give it the name it still carries: the ontological argument (from the Greek for "being"; an argument about God that runs from the very concept of God rather than from anything observed in the world). Anselm himself never called it that. He just called it the thing he had been looking for. It sits in Chapter II of the Proslogium, and it is short enough to walk through whole.

It starts with a definition, and the definition does all the work, so it is worth getting exact. God, Anselm says, is "a being than which nothing greater can be conceived." Not the biggest thing, not the strongest, not a being at the top of a list of beings. The greatest conceivable being: a being such that no greater one can even be thought. The definition is deliberately built so that any believer and any unbeliever can accept it, because it does not yet claim that such a being exists. It only says what the word "God" means. Even someone who denies God can understand the phrase, the way someone can understand "the largest prime number" without committing to there being one.

Anselm then makes a move about the unbeliever, the one scripture calls the fool: "the fool hath said in his heart, there is no God" (Anselm is quoting Psalm 14). The fool denies God. But the fool still understands the phrase "a being than which nothing greater can be conceived" when he hears it; that is what makes his denial a denial of something. So the being exists at least in the fool's understanding, as a concept he grasps. Anselm draws a careful line here between two ways a thing can be "in" the mind, and uses a craftsman to do it. "When a painter first conceives of what he will afterwards perform, he has it in his understanding, but he does not yet understand it to be, because he has not yet performed it. But after he has made the painting, he both has it in his understanding, and he understands that it exists, because he has made it." A planned painting exists only in the mind. A finished painting exists in the mind and in reality. So far the greatest conceivable being is like the planned painting: granted, at least, to exist as a concept.

Now comes the turn the whole thing rides on, the step in the epigraph. Take that greatest-conceivable-being and suppose it exists only in the understanding, as a concept and nothing more. Then a greater being can be conceived: namely, the very same being existing in reality as well as in the mind, because a thing that exists in reality is greater than the same thing existing in thought alone. But that is a contradiction. The being defined as the one than which nothing greater can be conceived has just turned out to have a greater conceivable than itself, the real version. The only way out of the contradiction is to drop the supposition that started it. The greatest conceivable being cannot exist in the understanding alone. It must exist in reality too. In Anselm's words, "there is no doubt that there exists a being, than which nothing greater can be conceived, and it exists both in the understanding and in reality."

God is by definition the greatest thing thinkable. A real thing beats an imaginary one. So a merely-imaginary God would not be the greatest thinkable thing, because a real one would be greater. Therefore the greatest thinkable thing has to be real. The argument is a kind of trap built out of a single definition: accept that "God" means the greatest conceivable being, and grant that existing-in-reality is greater than existing-only-as-an-idea, and the existence of God follows. The concept carries it in.

What makes this proof unlike every other argument for God is what it never does. It never looks at the world. It does not point to the order of the stars, or the intricacy of an eye, or trace a chain of causes back to a first one. Every one of those arguments starts outside, in creation, and reasons inward to a creator. Anselm starts and ends inside the concept. The entire proof could be run by a mind in an empty room with its eyes shut, because its only raw material is the idea of God and a claim about what makes one thing greater than another. That is the feature Kant would seize on, and it is the exact feature that Aquinas would reject. An argument to a real being from a bare concept, with no appeal to anything observed, was something new in the world.

Anselm did not stop at existence. In Chapter III he pushes one step harder, to the claim that "God cannot be conceived not to exist." A being that merely happens to exist, and might not have, is less great than a being whose non-existence cannot even be thought. So the greatest conceivable being must exist in that stronger way: necessarily, such that its not-being is unthinkable. Most things, a tree, a city, the fool himself, can be imagined away without contradiction. God, on Anselm's argument, is the one being that cannot. This is the deeper edge of the proof, and it is the part that twentieth-century logicians would return to long after the simpler version was thought dead.

Chapter 3

On behalf of the fool

"it is said that somewhere in the ocean is an island, which, because of the difficulty, or rather the impossibility, of discovering what does not exist, is called the lost island."

The objection arrived almost at once, and from inside the cloister rather than outside it. Gaunilo, a monk of the abbey of Marmoutiers, wrote a short reply called "In Behalf of the Fool" (taking the side of the unbeliever Anselm had argued against). Gaunilo did not deny that God exists; as a monk he believed it. He denied that Anselm's argument worked, and he had a parody ready that has stuck to the proof ever since.

Suppose, Gaunilo says, someone describes a perfect island. The epigraph gives it: somewhere in the ocean lies an island so blessed it is called the lost island, "more excellent than all other countries," richer than the legendary Isles of the Blest, heaped with every delicacy, owned by no one. Anyone can understand the description; the island is now in the understanding, exactly the way Anselm's God was. So run Anselm's own machine on it. An island that exists in reality would be more excellent than the same island existing only as an idea. Therefore, by Anselm's reasoning, the most excellent conceivable island must exist in reality, or it would not be the most excellent. But that is absurd. No chain of reasoning conjures a real island into the ocean. And if the form of the argument produces a guaranteed island, the form is broken, and it cannot be trusted to produce a guaranteed God either.

The island parody is one of the cleanest objections in the history of philosophy, because it does not attack the conclusion. It attacks the machine. It says: whatever is wrong here, it is wrong with the method, since the same method, fed a different noun, spits out something everyone agrees is false. Gaunilo's island has kept its bite for nine hundred years: almost any modern person who hears the ontological argument for the first time arrives independently at the same parody, which suggests the flaw it points at is a real one.

Anselm answered, and thought the answer important enough that he had Gaunilo's objection and his own reply copied and bound together with the Proslogium from then on, so that the proof would always travel with its sharpest attack attached. That decision says something about the man. He did not bury the best objection to his life's argument. He stapled it to the front. His reply rests on a single distinction: the island and God are not the same kind of thing, so the argument that works on one does not transfer to the other. An island is a contingent thing. It happens to exist or happens not to, and either way its non-existence is perfectly thinkable; there is nothing about island that resists being imagined away. "The greatest conceivable being" is, Anselm argues, the one and only concept for which non-existence is not thinkable (the Chapter III point), because a being that could be thought not to exist would by that very fact not be the greatest conceivable. The proof was never a general engine for conjuring the best possible anything. It was built to work on exactly one concept, the one whose definition includes being unsurpassable, and Anselm says so directly: "if any man shall devise anything existing either in reality or in concept alone (except that than which a greater cannot be conceived) to which he can adapt the sequence of my reasoning, I will discover that thing, and will give him his lost island, not to be lost again."

Whether that reply actually saves the argument is one of the genuinely open questions in philosophy; smart people still line up on both sides. The defender's case is that Gaunilo's island smuggles in a hidden flaw, since a "greatest possible island" is incoherent in a way "greatest possible being" is not (an island can always be improved, by one more palm tree, one more beach, so there is no greatest, while a greatest being has a ceiling that an island lacks). The critic's case is that Anselm has only relocated the problem, not solved it, and that the move from "a being whose non-existence is unthinkable" to "a being that exists" still helps itself to the very thing in dispute. The argument and its parody have been arguing with each other for nine hundred years, bound in the same volume the whole time, and neither has finished the other off.

Chapter 4

Why God became man

"This volume contains : (1) The Proslogium, (2) the Monologium, (3) the Cur Deus Homo …"

The ontological argument is the work everyone remembers, but it was not the work that occupied Anselm most, nor the one his own century leaned on hardest. That was a later book, written when he was already archbishop and often in exile: Cur Deus Homo, "Why God Became Man" (around 1095 to 1098). Its question is not whether God exists but why, given that He does, the central Christian claim takes the strange shape it does. Why would God become a particular human being and die? The book is cast as a dialogue with a monk named Boso, who is asked to play the skeptic and press the hard questions, and it sets out the answer that came to dominate Western thinking about the cross: the satisfaction theory of atonement (atonement being the repairing of the breach between God and humanity that sin opened).

The argument is built like a problem in justice, and it is best taken one move at a time. Start with what sin is. To sin, for Anselm, is to fail to give God the honor and obedience owed to Him. That failure is a debt. And here is the engine: the gravity of an offense scales with the dignity of the one offended, so an offense against an infinite God is, in a sense, an infinite offense, carrying a debt of infinite size. A human being cannot pay it. Even perfect obedience from here on would only render what was already owed; it could never make up the arrears. Humanity is in debt past any human capacity to clear.

Now the second move, the one Boso is made to push on. Why can God not simply forgive the debt, wave it away by mercy and be done? Anselm's answer is that a God who let sin go unpaid, as if it did not matter, would be treating the disordered and the rightly-ordered the same, and that is not mercy but a failure of justice; it would leave a wound in the order of things unhealed. The debt has to be actually paid, not waved off. So the situation is a vise. The debt is infinite, which means only God is great enough to pay it. The debt is owed by humanity, which means it must be paid by a human, the party that owes. Only one being could possibly satisfy both conditions at once: one who is fully God, and therefore able to render something of infinite worth, and fully human, and therefore the right party to render it. A God-man. The Incarnation, on this argument, is not an arbitrary act of cosmic theater. It is the single solution to a debt that nothing else in the universe could discharge, which is why the book is titled with the question it answers: why God became man.

The structure of the argument matters as much as its content, because it is fides quaerens intellectum doing its most ambitious work. Anselm sets out, in the book's own framing, to show the necessity of the Incarnation remoto Christo, "with Christ set aside," reasoning as if the reader did not already know the answer from the Gospels, and arriving at it anyway by the logic of the case. The faith is held first, as always. But then reason is sent in to show that the central mystery of that faith is not a brute fact one simply has to swallow; it has a shape, an inner rationale, a why. That is the same nerve that drove the ontological argument, turned now on the Incarnation instead of on God's existence. The satisfaction theory went on to shape Western Christianity for a thousand years, running straight into the Reformation and the way much of Protestant and Catholic thought still pictures the cross. Whatever one makes of the theology, as a piece of reasoning it is Anselm to the core: take a thing held on faith, and refuse to rest until reason can show why it had to be so.

Chapter 5

The reluctant archbishop

"He had often declared that he would rather be in his grave than be Archbishop of Canterbury."

The man who wrote those weightless, world-detached arguments spent the last sixteen years of his life in a heavy, very worldly fight, and he did not want any of it. In 1093 the see of Canterbury, the highest church office in England, fell to him, and by every account he resisted. The old story, from Eadmer (the monk who was Anselm's constant companion and wrote his life, so the color comes from a devoted insider rather than a neutral record), has the dying English king William II pressing the office on a horrified Anselm and the bishops forcing the pastoral staff into his clenched fist while he refused to open it. Anselm had a scholar's temperament and a monk's love of quiet, and the archbishopric promised the opposite of both. The framing is Eadmer's, fond and partisan, but the reluctance was real and well attested: he took the office under protest and regretted it for the rest of his life.

The fight he walked into was the great church-state struggle of the age, the investiture controversy (the question of who had the right to "invest" a bishop with the symbols of his office, the ring and the staff). At stake under that ceremonial question was real power. A king who handed a bishop his staff was claiming that bishops were the king's men, appointed and answerable to the crown. The reforming party in the Church insisted that spiritual office came from the Church alone and that a layman, even a king, had no business conferring it. Anselm, who had taken the job mostly to be left alone with his prayers and his arguments, found himself the Church's man at the front line of that quarrel in England, against two kings in turn who had no intention of giving up their bishops.

It cost him two exiles. Under William II the conflict, over recognizing the pope and over the king's grip on the Church, grew unbearable, and Anselm left England in 1097 rather than yield, staying away on the Continent until the king died. He came back under the new king, Henry I, and the same fight reopened almost at once over lay investiture, sending him into a second exile from 1103 to 1106. He was, throughout, an unlikely warrior: not a born politician, not a man who relished the maneuvering, but stubborn on the one point he would not bend, which was that the Church's offices were not the king's to sell or bestow. A settlement was finally reached in 1107, the Concordat of London, that split the difference, the king gave up investing bishops with ring and staff while keeping a hand in their selection, a compromise that became a model for settling the same fight elsewhere.

He did not have long to enjoy the peace. Anselm died at Canterbury on 21 April 1109, around seventy-six years old, worn down by a fight he had never wanted. The two halves of his life sit oddly together and were powered by one engine. The same conviction that there is a single order of truth, and that a mind owes it everything, produced both the cloistered proof that looks at nothing and the exhausting public stand that refused to let a king reduce the Church to a department of state. He would much rather have stayed in the cloister. The arguments are what he was for. The archbishopric is what he endured.

Chapter 6

The father of scholasticism, and what came after

"Therefore, if that, than which nothing greater can be conceived, exists in the understanding alone … But obviously this is impossible."

Anselm is often called the father of scholasticism, and the epithet, used carefully, fits. Scholasticism (the method of the medieval schools: take a question, state the strongest objections, reason toward an answer, and resolve the objections one by one) had many parents, including the cathedral schools and the next generation's Abelard and his contemporaries (era 2, chapter 5). But Anselm stands near its head because of what he was willing to ask reason to do. Before him, the Augustinian default mostly used reason to defend and deepen a faith it took for granted. Anselm sent reason out to demonstrate, to build arguments tight enough to stand on their own and convince a doubter, and he did it from inside the faith, never against it. That posture, rigorous argument in the service of belief, with the belief held first, is the posture the whole scholastic enterprise would adopt.

He is best placed as a bridge. Behind him stands Augustine (era 2, chapter 1), whose crede ut intelligas, believe in order to understand, Anselm took up word for word as a method. Ahead of him stand the great reasoning machines of the thirteenth century, when the recovered Aristotle and the Arabic transmission (era 2, chapters 3 and 4) would arm Christian thinkers with a whole new toolkit and the schools would build cathedrals of argument. Anselm worked before any of that arrived; he had no Aristotle to speak of, only Augustine, his own logic, and an almost reckless trust that the mind could reach further than anyone had let it. He is the moment the medieval West decided that faith seeking understanding could mean proof, and not just devotion.

His own signature argument did not survive the bridge intact. When Aquinas came to ask, two centuries later, whether God's existence can be proved, he took up Anselm's proof and rejected it. Aquinas grants that if one could survey God's own nature, God's existence would be self-evident, for in God essence and existence are one. But human minds do not have that view. They cannot move, Aquinas argues, straight from the idea of "a being than which nothing greater can be conceived" to that being's actual existence in reality, because granting the idea only puts a concept in the mind; it does not reach across to the world. The fact that we can think of God as the greatest does not establish that anything answering to the thought is really out there. For Aquinas the existence of God has to be earned the long way, from the world, from effects traced back to their cause; that is what his Five Ways do. The two men agree completely on the conclusion, that God exists, and split sharply on the method. Anselm thought the idea alone could deliver it. Aquinas thought only the world could.

And then the argument that Aquinas had set aside refused to die. Descartes revived a version of it in the seventeenth century, reasoning from the idea of a perfect being to that being's existence (era 3). Kant, a century after that, mounted the attack that most philosophers still treat as decisive, that existence is not a property a thing can have or lack the way it has a color or a size, so "adding" existence to the concept of the greatest being adds nothing to the concept and proves nothing about reality, and it was Kant who pinned on the whole family of such arguments the name they now carry, the ontological argument. That looked like the end. It was not. In the twentieth century logicians rebuilt Anselm's harder Chapter III version, the one about a being whose non-existence is unthinkable, in the formal language of modal logic, and argued it back to life on new ground. The proof has been declared dead in every century since it was written, and it has outlived every obituary.

That afterlife is the real measure of the monk at Bec. Anselm asked a question so strange that nine hundred years of philosophy has not been able to put it down: can the mere idea of God, thought through honestly, force the conclusion that God is real? He believed the answer was yes, and that believing it first was no obstacle to proving it, because faith and reason serve one truth and could be trusted not to collide. He turned out to be the start of a conversation rather than the end of one. The argument he found in a fit of obsession, tried to set aside as a distraction from prayer, and finally wrote down, is still on the table, still bound beside the island that was meant to sink it, still waiting for someone to say, finally, what is wrong with it, or to admit that nothing is.