The Lives and Opinions of Eminent Philosophers
Translated by C D Yonge
Free public-domain edition — preview in your browser, no account required for the first chapter.
Preview free · sign up to save progress, download to your shelf, and sync with the apps
Already have an account? Sign in
This book is essential for anyone seeking the original source material on ancient Greek philosophy, offering a vivid, humanizing portrait of the thinkers whose ideas shaped Western thought.
Edition details
Book Summary
A foundational work of doxography, Diogenes Laërtius's 'Lives and Opinions of Eminent Philosophers' chronicles the lives, teachings, and successions of ancient Greek thinkers from Thales to Epicurus. Blending biography, anecdote, and philosophical doctrine, it preserves the origins and evolution of major schools, offering an indispensable portrait of philosophy as a way of life.
The book systematically traces Greek philosophy into two main lineages: the Ionian school (from Thales through Anaximander, Anaximenes, Anaxagoras, and Socrates down to Plato and the Academics) and the Italian school (from Pythagoras through the Eleatics and atomists). Each entry combines biographical details—often humorous or dramatic anecdotes about the philosopher's character, eccentricities, and moral tests—with summaries of their core doctrines. Key figures include Thales, the first philosopher and astronomer; Solon, the Athenian lawgiver who refused tyranny; the Seven Sages with their practical aphorisms; and later thinkers such as Democritus, who developed atomism, and Pyrrho, the founder of Skepticism. The work culminates in a lengthy treatment of Epicurus, detailing his hedonistic ethics, his view of death as nothing to us, and his emphasis on friendship and prudence. Throughout, Diogenes records the manner of each philosopher's death and includes epitaphs, underscoring the theme of legacy. The text also distinguishes genuine wisdom from sophistry, shows philosophers navigating political power—from wise counsel to violent tyranny—and emphasizes self-discipline as central to the good life.
Reading guide
Go deeper in The Lives and Opinions of Eminent Philosophers
Character guides, themes, chapter companions — plus Character Web, narrative arc, and theme heatmap teasers that unlock fully beside the text in BetterReads.
Narrative arc
Story tension across the book.
Plato
Plato stands at the center of Diogenes Laërtius's third book, the heir who gave Socrates' restless questioning a school, a system, and a library of dialogues. His relationship to his teacher is the book's great hinge: he preserved Socrates in writing while transforming him into a metaphysician of transcendent Forms. Early in the Lives, Plato's Academy becomes the institution against which every later sect — Cynic, Stoic, Epicurean — defines itself, making him the gravitational center of the whole succession.
Socrates
Socrates dominates the middle books as the teacher whose pupils founded rival schools — Plato, Antisthenes, Aristippus, Euclid — each claiming his legacy. Diogenes Laërtius shows him as both the most delightful of conversationalists and the most exasperating, praised by Theopompus and mocked by Aristophanes for his strut and threadbare cloak. His refusal to write, and his death, force every subsequent philosopher to define virtue, knowledge, and the good life in his shadow.
Diogenes of Sinope
Diogenes of Sinope arrives in Athens as a fugitive — his father ran the public bank and adulterated the coinage — and attaches himself to Antisthenes with such pertinacity that even a raised stick cannot drive him off. He sleeps in a cask, doubles his cloak, carries a wallet, and answers the world's comforts with a mouse's example of needing nothing. His shamelessness is the engine of the Cynic succession, the living proof that virtue can be performed without argument, and the direct ancestor of Zeno's Stoicism.
Zeno of Citium
Zeno arrives in Athens after a shipwreck and turns to philosophy, building the Stoic school whose doctrines Diogenes Laërtius treats as the most manly of the Socratic inheritances. He is a man of political weight in his own city and a teacher whose followers include Cleanthes and Chrysippus, the architects of the Stoa. His famous death — biting a tyrant and spitting out his tongue — crystallizes the Stoic conviction that the body can be crushed but the will cannot, a lesson the whole later tradition repeats.
Epicurus
Epicurus closes Diogenes Laërtius's Lives as the founder of the last great school, the Garden, whose doctrines of atomism, friendship, and tranquil pleasure stand in deliberate contrast to Stoic austerity. His letters and maxims, preserved at length in Book X, present a teacher who prized the quiet life, the company of friends, and the removal of fear above public honor. He matters to the book's arc as the counterweight to Zeno: two paths out of Socrates, one through endurance, one through pleasure, both claiming the wise man's peace.
Aristotle
Aristotle appears in Diogenes Laërtius as the great classifier, the pupil of Plato who founded the Lyceum and whose writings span logic, ethics, politics, and natural science. His relationship to Plato is the book's central intellectual drama — the student who revered the master yet built a rival school — and his connection to Alexander the Great gives philosophy a political reach no other thinker in the Lives can claim. He is the bridge between the Athenian schools and the Hellenistic world, the figure through whom Greek thought becomes encyclopedic.
Virtue and Self-Sufficiency
A central theme across multiple philosophers, especially Antisthenes and the Cynics, is that virtue alone is sufficient for happiness and that the wise man needs nothing external, regulating his conduct by the law of virtue rather than state laws.
The Philosopher's Life and Character
The book extensively recounts anecdotes about philosophers' personal conduct, eccentricities, and moral tests—such as Xenocrates' continence with courtesans or Diogenes' asceticism—emphasizing that a philosopher's life is a direct reflection of their doctrines.
Origins and Succession of Philosophical Schools
The work systematically traces the lineages of Greek philosophy into the Ionian and Italian schools, detailing the teacher-student successions from Thales to Epicurus and from Pythagoras to the Stoics, establishing a historical framework for philosophical thought.
Wisdom vs. Sophistry
The text distinguishes between genuine wisdom (sophia) and mere cleverness or sophistry, noting that Pythagoras coined the term 'philosopher' to avoid calling himself wise, and that many figures criticized empty dialectical hair-splitting as useless for governing men.
Reading tools
BetterReads is more than a book page—e-reader, AI beside the text, audiobooks, and native apps in one system.