The Meditations of Marcus Aurelius are treasured today—as they have been over the centuries—as an inexhaustible source of wisdom. And as one of the three most important expressions of Stoicism, this is an essential text for everyone interested in ancient religion and philosophy. Yet the clarity and ease of the work’s style are deceptive. Pierre Hadot, eminent historian of ancient thought, uncovers new levels of meaning and expands our understanding of its underlying philosophy.

Written by the Roman emperor for his own private guidance and self-admonition, the Meditations set forth principles for living a good and just life. Hadot probes Marcus Aurelius’s guidelines and convictions and discerns the hitherto unperceived conceptual system that grounds them. Abundantly quoting the Meditations to illustrate his analysis, the author allows Marcus Aurelius to speak directly to the reader. And Hadot unfolds for us the philosophical context of the Meditations, commenting on the philosophers Marcus Aurelius read and giving special attention to the teachings of Epictetus, whose disciple he was.

The soul, the guiding principle within us, is in Marcus Aurelius’s Stoic philosophy an inviolable stronghold of freedom, the “inner citadel.” This spirited and engaging study of his thought offers a fresh picture of the fascinating philosopher-emperor, a fuller understanding of the tradition and doctrines of Stoicism, and rich insight on the culture of the Roman empire in the second century. Pierre Hadot has been working on Marcus Aurelius for more than twenty years; in this book he distills his analysis and conclusions with extraordinary lucidity for the general reader.

Nearly twenty-five hundred years ago the Greek thinker Heraclitus supposedly uttered the cryptic words "Phusis kruptesthai philei." How the aphorism, usually translated as "Nature loves to hide," has haunted Western culture ever since is the subject of this engaging study by Pierre Hadot. Taking the allegorical figure of the veiled goddess Isis as a guide, and drawing on the work of both the ancients and later thinkers such as Goethe, Rilke, Wittgenstein, and Heidegger, Hadot traces successive interpretations of Heraclitus' words. Over time, Hadot finds, "Nature loves to hide" has meant that all that lives tends to die; that Nature wraps herself in myths; and (for Heidegger) that Being unveils as it veils itself. Meanwhile the pronouncement has been used to explain everything from the opacity of the natural world to our modern angst.

From these kaleidoscopic exegeses and usages emerge two contradictory approaches to nature: the Promethean, or experimental-questing, approach, which embraces technology as a means of tearing the veil from Nature and revealing her secrets; and the Orphic, or contemplative-poetic, approach, according to which such a denuding of Nature is a grave trespass. In place of these two attitudes Hadot proposes one suggested by the Romantic vision of Rousseau, Goethe, and Schelling, who saw in the veiled Isis an allegorical expression of the sublime. "Nature is art and art is nature," Hadot writes, inviting us to embrace Isis and all she represents: art makes us intensely aware of how completely we ourselves are not merely surrounded by nature but also part of nature.

A magisterial mappa mundi of the terrain that Pierre Hadot has so productively worked for decades, this ambitious work revises our view of ancient philosophy—and in doing so, proposes that we change the way we see philosophy itself. Hadot takes ancient philosophy out of its customary realm of names, dates, and arid abstractions and plants it squarely in the thick of life. Through a meticulous historical reading, he shows how the various schools, trends, and ideas of ancient Greek and Roman philosophy all tended toward one goal: to provide a means for achieving happiness in this life, by transforming the individual’s mode of perceiving and being in the world.

Most pressing for Hadot is the question of how the ancients conceived of philosophy. He argues in great detail, systematically covering the ideas of the earliest Greek thinkers, Hellenistic philosophy, and late antiquity, that ancient philosophers were concerned not just to develop philosophical theories, but to practice philosophy as a way of life—a way of life to be suggested, illuminated, and justified by their philosophical “discourse.” For the ancients, philosophical theory and the philosophical way of life were inseparably linked.

What Is Ancient Philosophy? also explains why this connection broke down, most conspicuously in the case of academic, professional philosophers, especially under the influence of Christianity. Finally, Hadot turns to the question of whether and how this connection might be reestablished. Even as it brings ancient thoughts and thinkers to life, this invigorating work provides direction for those who wish to improve their lives by means of genuine philosophical thought.