The Rigor of Angels: Borges, Heisenberg, Kant, and the Ultimate Nature of Reality

A NEW YORK TIMES AND NEW YORKER BEST BOOK OF THE YEAR — A poet, a physicist, and a philosopher explored the greatest enigmas in the universe--the nature of free will, the strange fabric of the cosmos, the true limits of the mind — and each in their own way uncovered a revelatory truth about our place in the world

" A] mind-expanding book...Elegantly written." — The New York Times

"A remarkable synthesis of the thoughts, ideas, and discoveries of three of the greatest minds that our species has produced." — John Banville, The Wall Street Journal

Argentine poet Jorge Luis Borges was madly in love when his life was shattered by painful heartbreak. But the breakdown that followed illuminated an incontrovertible truth — that love is necessarily imbued with loss, that the one doesn't exist without the other. German physicist Werner Heisenberg was fighting with the scientific establishment on the meaning of the quantum realm's absurdity when he had his own epiphany--that there is no such thing as a complete, perfect description of reality. Prussian philosopher Immanuel Kant pushed the assumptions of human reason to their mind-bending conclusions, but emerged with an idea that crowned a towering philosophical system--that the human mind has fundamental limits, and those limits undergird both our greatest achievements as well as our missteps.

Through fiction, science, and philosophy, the work of these three thinkers coalesced around the powerful, haunting fact that there is an irreconcilable difference between reality "out there" and reality as we experience it. Out of this profound truth comes a multitude of galvanizing ideas: the notion of selfhood, free will, and purpose in human life; the roots of morality, aesthetics, and reason; and the origins and nature of the cosmos itself.

As each of these thinkers shows, every one of us has a fundamentally incomplete picture of the world. But this is to be expected. Only as mortal, finite beings are we able to experience the world in all its richness and breathtaking majesty. We are stranded in a gulf of vast extremes, between the astronomical and the quantum, an abyss of freedom and absolute determinism, and it is in that center where we must make our home. A soaring and lucid reflection on the lives and work of Borges, Heisenberg, and Kant, The Rigor of Angels movingly demonstrates that the mysteries of our place in the world may always loom over us — not as a threat, but as a reminder of our humble humanity.

"Poetry, science, philosophy — for the ancients, these intellectual-artistic pursuits taught us what it is to be human: how to transcend our current station, how to grow and flourish, how to remain humble in the face of mystery and failure. Egginton's The Rigor of Angels is a stark reminder of what each of us can achieve if we only remember what remarkable beings we are." — John Kaag, author of Hiking with Nietzsche

"This book brilliantly weaves together the core ideas of three of the greatest minds of Western literature, philosophy, and physics into a soul-searching narrative. Egginton masterfully illuminates the paradox of being human, of being caught between the search for the order behind things and the magic of the transcendent, of knowing that we are playthings in the hands of time, as our lives continually fork as we make choices and we become one self while imagining countless others." — Marcelo Gleiser, author of The Dawn of a Mindful Universe: A Manifesto for Humanity's Future

"Egginton, a humanities scholar, presents this overview with panache and a keen sense of story, making the more complex scientific theories accessible and entertaining." — Booklist

William Egginton is the Decker Professor in the Humanities, chair of the Department of Modern Languages and Literatures, and Director of the Alexander Grass Humanities Institute at Johns Hopkins University. He is the author of multiple books, including How the World Became a Stage (2003), Perversity and Ethics (2006), A Wrinkle in History (2007), The Philosopher's Desire (2007), The Theater of Truth (2010), In Defense of Religious Moderation (2011), The Man Who Invented Fiction: How Cervantes Ushered in the Modern World (2016), The Splintering of the American Mind (2018), and The Rigor of Angels (2023), which explores the respective conceptions of reality in the thought of Borges, Kant, and Heisenberg. He is co-author with David Castillo of Medialogies: Reading Reality in the Age of Inflationary Media (2017) and What Would Cervantes Do? Navigating Post-Truth with Spanish Baroque Literature (2022). His next book, on the philosophical, psychoanalytic, and surrealist dimensions of the work of Chilean director Alejandro Jodorowsky, will be published in 2024.