Giordano Bruno

Giordano Bruno of Nola

For all of human history before him, the universe had walls. The cosmos people lived in was a tidy, finite nest of crystal spheres, the Earth fixed and heavy at the center, the Sun and planets wheeling around it, the whole thing closed off by an outermost dome on which the stars were fixed, like lamps set into the inside of a ceiling. Even Copernicus, who had just dared to swap the Earth and the Sun, kept the walls; he only moved the center. Then came Giordano Bruno, a runaway monk with no telescope and nothing but the ferocious reach of his imagination, and he did what no one had dared. He took a hammer to the outermost sphere and shattered it. The universe, he declared, is infinite. It has no walls and no center, no privileged place and no edge. The points of light overhead are not lamps on a dome; they are other suns, scattered without number through endless space, and around them turn other worlds, countless other earths, very possibly full of life. With no instrument but his own mind, Bruno saw, four centuries early, the universe we now know we live in.

A universe without an edge. It is hard, now, to feel how violent this idea was, because we were raised inside it. To Bruno's contemporaries an infinite, centerless universe was not merely false but terrifying and impious: it dethroned the Earth, dethroned humanity, and seemed to dissolve the whole comforting hierarchy of a cosmos built around us with heaven on top. Bruno embraced precisely what they feared. Why, he asked, should the universe have a wall? What would be on the far side of it? Any boundary you try to imagine, you can always ask what lies beyond it, and the only answer that does not collapse is: more. An infinite God, he reasoned, would never make a cramped little finite world; infinite power overflows into infinite effect, infinite space, infinite worlds. And once you let the center go, the rest cascades: the Earth is nothing special, the Sun is just one star among endless others, "up" and "down" are merely local illusions, and the human being is not the still point at the middle of creation but a passenger on one small world among innumerable others. It is the very vertigo a modern person feels looking up at the scale of the cosmos, and Bruno felt it first, and rather than recoiling, he found it glorious.

God is not above the world but in it. And here is the deeper heresy, the one that mattered far more to his judges than any astronomy. If the universe is infinite and divine power fills it without limit, then where, exactly, is God? Not, Bruno answered, outside the universe, looking in from some throne beyond the sphere, because there is no outside anymore; the walls are gone. God is within, the infinite living principle present in every part of the endless whole, the soul of the world, the one inexhaustible reality that pours itself out into infinite matter and is wholly present in all of it. Spirit and matter are not two warring things but one; the cosmos is not a dead machine built by a distant craftsman but a single living, divine, animate being, of which you and the stars and the dust between them are all expressions. He took the seed of this from his great predecessor Nicholas of Cusa, the cardinal who had taught that in the infinite all opposites coincide, and pushed it to the limit. This pantheism, the identification of God with the infinite living universe, was the genuinely dangerous thing about Bruno, much more than his cosmology, because it dissolved the line between creator and creation on which the whole edifice of the Church was built. A century later, a quiet lens-grinder in Holland named Spinoza would arrive at nearly the same vision, and call it, simply, "God, or Nature."

The hunt for the infinite. This infinite universe was not, for Bruno, a cold abstraction; it was an object of love, and the philosopher's life was a heroic chase after it. In his most lyrical work, the Heroic Frenzies, he reimagines the old love poetry of the troubadours: the beloved who is always just out of reach, forever fleeing ahead of the desperate lover, becomes, for Bruno, the infinite divine itself, which the mind pursues but can never finally seize, because it is endless. The true philosopher is a kind of heroic hunter, driven by a noble frenzy, an eros for the infinite that can never be satisfied because its quarry has no bottom, and would not wish it satisfied, because the endless pursuit is itself the highest life. This is why Bruno also poured himself into the ancient art of memory, building vast imagined palaces and wheels of images in the mind, not as a party trick but as a discipline for bringing the soul into alignment with the cosmos it was hunting. To know the infinite universe, he thought, you had to make your own mind a mirror of it, as boundless and as alive.

The courage of the vision. For seventeen years Bruno wandered Europe, lecturing and publishing his vision wherever the censors were loose, until he was betrayed and handed over to the Inquisition. They held him for years and set before him a list of propositions to renounce. He would not. Offered the simple road of recantation, the chance to take it all back and save himself, he refused to deny what he had seen, and held to his infinite, living universe against the entire massed authority of his age. The Church condemned him as an unrepentant heretic and did everything in its power to erase him, to burn his books and blot his name out of memory. It did not work. Three centuries later, in 1889, the free-thinkers of a new Italy raised a brooding bronze statue of Bruno on the very square in Rome where the Church had tried to silence him, hooded and defiant, glaring across the city toward the Vatican, and there he still stands, a patron of everyone who has ever been told that some truths are too dangerous to think. His story was meant to be a warning. It became, instead, one of the great emblems of the freedom of the mind.

The prophet of more. The room holds one of Bruno's strange, beautiful dialogues, the Heroic Frenzies, in an old translation, and reasons about the rest from the record; the chat will tell you which is which. It is worth ending on the vindication, because it is total. Nearly everything Bruno was condemned for thinking, the world now simply knows to be so. The universe is vast beyond imagining, very possibly infinite; there is no center; the Sun is an ordinary star among hundreds of billions in our galaxy alone, and the galaxies themselves are past counting; and in the last few decades we have found that other suns do indeed have other worlds, thousands of them already, exactly as Bruno insisted, and we now scan them, in earnest, for signs of life. The runaway monk condemned for dreaming of infinite worlds turned out to be one of the most accurate prophets in the history of thought, not because he had better evidence than anyone else, but because he had the nerve to follow an idea straight past the walls that everyone else was afraid to cross. His method, if it can be called one, was simply this: when everyone assumes a limit, ask what is on the other side of it, and have the courage to answer, honestly, "more."