This volume, edited and introduced by Arnold I. Davidson and translated by Michael Chase, is not a continuous treatise or a single system. It gathers essays in four parts devoted to method, spiritual exercises, philosophical figures, and recurring themes, followed by an interview with Pierre Hadot. One question unifies them: what did philosophy mean in antiquity? Hadot argues that it referred first not to the production of theoretical discourse but to the choice of a way of life. Doctrines, commentaries, and arguments remained indispensable, yet their role was connected to that choice. They supplied reasons, rules, and practices through which a person could alter judgment, conduct, and the perception of the world.

That claim rests on an exacting practice of reading. Hadot begins with the ancient text, its critical establishment, and its translation. Chase explains why he rendered Hadot’s French versions into English and then checked them against the Greek, Latin, or German. Replacing them mechanically with available English translations would often sever the connection between the wording Hadot interprets and the conclusion he draws. Such care is especially necessary because most Hellenistic philosophical literature has disappeared. Later writings preserve earlier traditions through particular schools, literary forms, translations, and reinterpretations. Historians must reconstruct those mediations without pretending that the surviving page gives transparent access to an original doctrine.

An ancient work must therefore be placed within the concrete practice that shaped it. Dialogue, exhortation, handbook, treatise, prayer, commentary, and personal note do not perform the same task. An apparent contradiction in Aristotle may arise because separate lessons approach different questions from different starting points. The recurring arguments of ancient consolations need not indicate intellectual poverty; their purpose is to reactivate familiar principles in a soul shaken by grief. Likewise, Marcus Aurelius’ Meditations are not a diary composed to disclose passing emotions. They are carefully fashioned exhortations addressed to himself, and their literary precision contributes to their power as exercises.

This approach also changes the history of ideas. For long periods, philosophical inquiry largely took the form of interpreting authoritative texts. Exegesis preserved traditions, but it also generated innovations through shifts of language and meaning. Hadot calls attention to such “creative mistakes.” Augustine reads a Latin expression in the Psalms through Neoplatonic metaphysics and discovers a claim about divine identity that the Hebrew did not contain. Porphyry distinguishes being as a pure act from a determinate being while attempting to make a passage in Plato’s Parmenides coherent. These developments should neither be dismissed as mere errors nor projected back into their sources. The historian must show how a textual difficulty, an inherited authority, and a later conceptual framework combined to produce something new.

For Hadot, “spiritual exercises” are neither exclusively religious practices nor a code of respectable behavior. They are repeated acts intended to transform one’s vision of the world, inner disposition, and outward conduct. Ancient schools begin from a therapeutic diagnosis: people suffer because of passions, judgments, fears, and desires directed toward unstable goods. Philosophy must therefore make effective truths that a person may understand without yet living by them. Meditation, memorization, reading, listening, research, examination of conscience, and preparation for difficulties keep basic principles available at the moment of action. A discourse proves philosophical through the use made of it, not through admiration for the skill of its interpreter.

The schools do not reduce these practices to one method. Stoics distinguish moral good and evil, which depend on freedom, from the causal order of events, which does not. Their exercises correct representations, cultivate consent to fate, and guide action toward the human community. This requires sustained vigilance and moral tension. Epicureans instead train the soul to relax. They turn attention away from anticipated pain, revive memories of past pleasure, recognize the simple pleasure of present existence, and limit desire to what is natural and necessary. Their physics removes fear of gods and death. Platonic concentration and purification, by contrast, separate the soul from what is alien to it and direct it toward thought and contemplation.

Socratic dialogue supplies a central model of philosophy’s practical force. Socrates does not deposit knowledge in another person’s mind. Beginning with his interlocutor’s own convictions, he repeatedly demands agreement and draws out their consequences until an apparently secure system of values loses its foundation. The hesitations and detours are therefore not defects in the argument; they are part of the exercise. A Platonic dialogue does more than settle its announced question. Like a lesson intended to teach reading rather than the spelling of one word, it develops a dialectical capacity applicable elsewhere. This friendly but genuine struggle brings a person into attentive relation with both self and others. Even solitary writing can perform a dialogical function by making confused actions objective under the imagined gaze of a rational community.

Early Christianity adopted many such exercises, but Hadot rejects the idea of simple continuity. Attention, self-examination, remembrance of death, meditation, and contemplative progress entered Christian and monastic life; philosophia could even name that life. Their meaning nevertheless changed through grace, the relation to God, imitation of Christ, humility, penitence, and obedience. A similar practice could thus serve a new end. In pagan schools and Christian adaptations alike, exercise is not a retreat into a possessive, self-satisfied ego. It frees the practitioner from passions and attachments so that the self becomes open to objectivity, other people, nature, or God. Perfect wisdom remains nearly inaccessible. Philosophy belongs to the condition of the person who seeks wisdom while knowing that he or she does not yet possess it.

The essays on Socrates and Marcus Aurelius demonstrate how Hadot’s method revises familiar portraits. Socrates appears beneath the mask of Silenus: ugly, comic, unsettling, and professedly ignorant, yet concealing unusual educational power. His irony splits him in two. He knows where the inquiry is heading while genuinely accompanying his interlocutor along its path, until that person discovers an inability to justify his own conduct. Socrates remains historically elusive because he wrote nothing and because Plato, Xenophon, Kierkegaard, and Nietzsche made him a mask for their own work. Linked with Eros, the resourceful intermediate being defined by lack, Socrates embodies a philosopher who transmits no possessed wisdom but awakens a desire for transformation.

Hadot’s treatment of Marcus corrects a different mistake. References to decay, the pettiness of human affairs, vanished generations, and forgotten names do not by themselves establish pessimism, illness, or opium addiction. Galen’s report about Marcus’ medicinal use of theriac does not support that diagnosis, and the Meditations cannot yield a direct psychological portrait of their author. Marcus is practicing inherited Stoic exercises. Physical definition strips an object of the conventional evaluations that make it seductive or repellent. The contemplation of forgotten peoples reduces ambition to scale. Concision and literary craftsmanship strengthen each sentence’s power of recall. What may look like a spontaneous confession is often a deliberately constructed instrument of self-persuasion.

Hadot relates this practice to the three areas of training distinguished by Epictetus. The discipline of judgment grants assent only to an objective representation. The discipline of desire accepts the course of nature and transforms obedience into willing consent. The discipline of impulse regulates conduct through justice and service to the community. Marcus gives these rules a strong emotional tone. Rational beings are members of one body, and even those who act unjustly remain part of the human community; their wrongdoing comes from ignorance. Notes addressed to oneself are therefore not substitutes for action. They prepare truthful judgment, desire aligned with the whole, and just conduct under the specific conditions of the present.

The thematic essays extend this reorientation. To “delimit the present” is not to erase duration but to free present action from sterile regret and imaginary fear. Stoics and Epicureans privilege the present for different reasons: moral vigilance and harmony with the cosmos for the former, release from anxiety and gratitude for existence for the latter. The “view from above,” from Plato and Lucian to Marcus, places wars, lawsuits, commerce, and ambition within the scale of the earth and time. The contemplation of nature likewise interrupts utilitarian perception, which divides the world into objects of use and concern. Philosophy, like art in some of the modern accounts Hadot discusses, becomes a practice of learning to see the world as a world and oneself as a moment within its movement.

The historical argument explains why philosophy as a way of life has become hard to recognize. Christianity absorbed spiritual exercises and sometimes claimed philosophy as the name of its own form of life, preserving parts of the ancient inheritance while assigning them different foundations. Through medieval and modern educational institutions, philosophical discourse acquired increasing autonomy and systematic form. University philosophy eventually came to be identified largely with the production and transmission of doctrines. Hadot does not claim that theory is useless. Ancient schools developed sophisticated logic, physics, and ethics. His point is that these discourses cease to fulfill their philosophical purpose when they are no longer connected with a way of judging, acting, and inhabiting the world.

The separation has never been complete. The collection finds renewed versions of the ancient attitude in Goethe, Nietzsche, Bergson, Wittgenstein, aspects of phenomenology and existentialism, and Foucault. Goethe helps Hadot describe the richness of the present: concentrated attention can apprehend an instant laden with a past and a future, like the decisive moment selected by an artist. Bergson and Merleau-Ponty help distinguish utilitarian perception from philosophical attention to the world’s very appearing. Hadot also recognizes the importance of Foucault’s practices of the self, while arguing that Foucault narrows their Stoic and Platonic scope by treating them primarily as an ethics of self-cultivation. Ancient inward movement is inseparable from a movement beyond individuality toward universal reason, nature, and community.

That reservation determines how the exercises may be approached today. Ancient practices depended on substantive accounts of reality: providence and Logos for the Stoics, atoms, chance, and the denial of posthumous existence for the Epicureans. Their techniques cannot simply be extracted as neutral devices or reproduced as fixed routines. The final interview tests the problem through innocent suffering. How can one consent to reality without Marcus Aurelius’ belief in a providence that orders the whole? Hadot still considers attention, dialogue, writing, examination of conscience, and mutual assistance useful in moments of crisis. Yet techniques remain secondary to a fundamental orientation of life. Philosophy is not an assortment of procedures for suppressing each disturbance separately.

Several limits protect the book’s argument from simplification. No surviving ancient manual completely codifies the exercises. The evidence is fragmentary, embedded in distinct genres, and transmitted through successive interpretations. The schools neither seek the same kind of tranquillity nor understand the cosmos in the same way. The sage is a governing ideal, not an ordinary achievement, and philosophical conversion does not eliminate the conflict between that ideal and everyday conventions. The central lesson is therefore an active distinction. Philosophical discourse states, explains, and justifies; philosophy as lived practice tests an entire existence. Neither should abolish the other. Their relation determines whether thought remains commentary alone or becomes attention, inner freedom, justice toward others, and consciousness of one’s place within a world larger than the individual.