Socrates
The philosopher who wrote nothing: to question relentlessly, hold virtue to be knowledge, and be wise only in knowing oneself ignorant.
Greek (Athenian) · 470 BCE – 399 BCE
The inaugural figure of Western philosophy, a fifth-century-BCE Athenian who wrote nothing: he is known only through his followers, above all and Xenophon, the caricature drawn by the comic poet Aristophanes, and the testimony of , hence the Socratic problem, the difficulty of telling the man apart from his portraits. The son of a stonemason and a midwife, he gave up the study of nature to question his fellow citizens about virtue, justice and beauty, wandering the agora and practising a relentless questioning, the , that unmasked false certainties. Charged with impiety and corrupting the youth, he was condemned to death by an Athenian court and drank the hemlock; his defence, reported by Plato in the , made him the model of the philosopher who dies for his mission. He directly inspired the minor Socratic schools, among them the , and, through Plato, the entire later tradition.
The unexamined life is not worth living: to know oneself and ceaselessly question one's opinions is the proper task of a human being.
No one does wrong willingly: every fault is a form of ignorance, for whoever truly knows the good cannot fail to do it.
The only knowledge that sets me apart is knowing that I know nothing: to recognize one's ignorance is the beginning of wisdom.
Care for your soul before your wealth and your reputation: nothing matters to a person more than the soul's excellence, and virtue is the sovereign good.
To know what courage or justice is means finding its single definition, the same across all cases: not examples, but the essence sought by reason.
Justification
After the Delphic oracle declared no one wiser than he, Socrates, convinced he knew nothing, set out to refute the god, and found that men reputed wise knew no more than he but believed they did. His superiority lies wholly in not imagining he knows what he does not: this is no that gives up on truth, but the mainspring of the , which dissolves false certainties to reopen the inquiry.
What I do not know, I do not think I know either.Plato, Apology, 21d
Plato, Apology, 20e-23b (the oracle and the inquiry)
Justification
Facing his judges, Socrates prefers death to giving up examination: philosophizing is for him an assigned post one does not desert, and the worst misery is not to suffer but to live in the self-satisfied ignorance of what one thinks one knows. Care of the soul requires putting every opinion to the test, beginning with one's own.
The unexamined life is not worth living.Plato, Apology, 38a
Plato's Apology
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Justification
When Socrates asks what is courage? or what is piety?, he sets aside the listing of examples and demands the single definition common to every case. Aristotle ascribes two things properly to him, inductive arguments and universal definition, while noting that he did not separate these universals from things, unlike the subsisting Forms Plato would add. To seek the one essence behind the manifold is already to hold the universal to be real.
Aristotle, Metaphysics, XIII, 4, 1078b (universal definitions) · Plato, Euthyphro, 5d-6e; Laches, 190d-192b (the demand for a definition)
Justification
Socrates seeks the true not in the observation of nature, from which he has turned away, but in the regulated examination of : one starts from the interlocutor's opinions and follows the argument wherever it leads, to contradiction or to agreement. It is reason in dialogue, not sense experience, that yields the definition; yet there is nothing in him of the doctrine of or recollection, which Plato will add.
Plato, Phaedo, 96a-99d (the turn away from natural science) · Cicero, Tusculan Disputations, V, 4, 10 (Socrates brought philosophy down from the heavens)
Justification
At his trial, Socrates refuses to give up philosophy even to save his life: what matters is not living but living well, and one cannot live well without examining oneself. The examination, driven by the , tears the interlocutor away from inherited opinions and makes self-knowledge, the Delphic injunction, the condition of a free life; an unexamined existence is lived in borrowed views and illusion.
The unexamined life is not worth living.Plato, Apology, 38a
Plato, Apology, 38a (the unexamined life is not worth living) · Plato, Apology, 29d-30a (the philosopher will not stop questioning)
Justification
Socrates urges the Athenians to care not for their body, their goods or their reputation as much as for the perfection of their soul. The only true good is the soul's excellence, virtue: everything else has worth only through it, wealth itself proceeding from virtue and not the reverse. The sovereign good is therefore neither pleasure nor a merely successful life, but the state of a soul made good.
It is not from wealth that virtue arises, but from virtue that wealth and every other good come to men.Plato, Apology, 30b
Plato, Apology, 29d-30b (the care of the soul)
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Justification
For Socrates, the true misfortune is not to suffer but to act wrongly: it is better to suffer injustice than to commit it. Nothing external can reach the good man in what makes his good, his soul; so he meets ordeal, and his own condemnation, with a steadiness that defuses its character as evil.
Gorgias, 469 · Apology; Crito
Justification
The Socratic procedure lies entirely in the question what is it?: what is courage, piety, justice? To ask for the definition is to presuppose a single, stable essence behind the diversity of particular cases, one that inquiry must bring out. Knowing this common nature matters more than listing examples.
Plato, Euthyphro · Plato, Laches and Meno
Justification
Socrates takes his calling to examine men as a mission entrusted to him by the god, one he cannot desert: he is stationed in Athens as at a post of battle one does not leave. The meaning of his life is thus given by a divine command, and the gods do not neglect the good man: far from a constructed meaning or an absurd universe, a watches over it.
Plato, Apology, 28d-29a (the post assigned by the god) · Plato, Apology, 41c-d (the gods' care for the good man)
Justification
Before his judges, Socrates declares himself serene: they may kill or banish him, they cannot harm him, for the only real evil is to make one's soul bad, and no one can do that in one's stead. External goods, the body, reputation, life itself, are not in our power and are not the true good; the soul's virtue, by contrast, depends on us. The Stoics would build their on this intuition.
They may kill me, banish me, strip me of my rights: Anytus and Meletus can do that, but harm me they cannot.Plato, Apology, 30c-d
Plato, Apology, 30c-d (they can kill me but not harm me) · Plato, Apology, 41c-d
Justification
To fear death, says Socrates, is to think oneself wise when one is not, for no one knows whether it is an evil. It is one of two things: either a dreamless sleep, and so a gain, or a journey of the soul to the dead, and so a blessing; in both cases the good man has nothing to fear. The proof of immortality will come from Plato; in Socrates the position stays suspended between these two hopes.
To fear death is nothing other than to think oneself wise when one is not, to think one knows what one does not know.Plato, Apology, 29a
Plato, Apology, 40c-41c (the two hypotheses about death)
Justification
Master of his appetites, able to bear cold, hunger and wine without giving in, Socrates embodies enkrateia, self-mastery through reason. He neither abolishes desire as the ascetics will, nor celebrates it: he submits it to reason's sorting, holding good only what serves the soul. Reduced need is for him a strength, not a deprivation.
Xenophon, Memorabilia, I, 2-3; I, 5 (self-mastery) · Plato, Symposium, 219b-220a (Socrates impervious to cold and wine)
Justification
Indifferent to luxury, going barefoot and wearing the same cloak in every season, Socrates does not for all that condemn pleasure: he feasts at the and can drink all night without drunkenness. His sobriety is not the asceticism that takes the body for an enemy, but a temperance that uses everything without being its slave.
Plato, Symposium, 220a and 223c-d · Xenophon, Memorabilia, I, 3, 5-15
Justification
In the , though unjustly condemned, Socrates refuses to escape: having lived his whole life under Athens' laws and accepted their benefits, he owes them obedience, and to disobey them in order to save himself would be to commit an injustice in turn and to ruin the city. Yet this deference has a firm limit: he will obey the god rather than the judges if they order him to stop philosophizing, and he has already refused an iniquitous order, that to arrest Leon of Salamis.
Plato, Crito, 50a-54d (the speech of the Laws) · Plato, Apology, 29d, 32c-d (obeying the god; the refusal to arrest Leon)
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Justification
The demand for a single definition of justice or courage presupposes that virtue has a nature, the same for all, and not a mere variable convention. Socrates thereby opposes the sophists and their relativism, summed up in Protagoras' saying, man is the measure of all things: if each measures the true and the good as they please, examination would lose its object. The just is discovered by reason, not decreed.
Plato, Theaetetus, 152a and 161c-e (Protagoras' formula, criticized) · Plato, Gorgias, 482e-484c (nature and convention)
Justification
For Socrates the criterion of action is neither the reckoning of consequences nor obedience to a law, but the state of the soul the act proceeds from: to act well is to act from an excellent soul. By making virtue the whole of morality and the object of self-care, he opens the tradition of virtue ethics later carried on by Aristotle and then the Stoics.
Plato, Apology, 30a-b; Crito, 47e-48a (the good soul, the only true good)
Justification
One does not choose a ship's pilot or a sick man's doctor by lot: ruling is likewise a form of knowledge, a craft requiring knowledge of the good, not everyone's business indifferently. Hence the Socratic critique of selecting magistrates by lot at Athens and of the supposed competence of the many. Plato will draw from it the rule of philosophers; in Socrates it is first the demand that the one who knows should decide.
Xenophon, Memorabilia, I, 2, 9; III, 9 (the art of ruling, selection by lot) · Plato, Gorgias, 455b-456a; Crito, 47a-48a (the expert analogy)
Justification
If wrongdoing is ignorance, the guilty party is less a villain than someone sick in soul, and punishment should cure rather than return evil for evil. To undergo a just penalty is even a good, since it frees the soul from the injustice that spoils it; punishing for revenge corrects nothing. The sanction counts as care and correction, placing Socrates on the side of a rehabilitative justice.
Plato, Gorgias, 476a-481b (punishment that heals the soul)
Justification
If virtue is knowledge, wrongdoing can spring only from a failure of knowledge: no one willingly goes toward what they hold to be evil. Socrates thus denies the possibility of , weakness of will: what looks like a passion overpowering reason is really a miscalculation between goods. Against the idea that desire or anger governs us, he makes knowledge the sufficient cause of right action.
Plato, Protagoras, 352b-358d (the denial of akrasia) · Plato, Meno, 77b-78b (no one desires evil knowing it as such)
Justification
Charged with impiety, Socrates replies that he believes in the gods more than his accusers do, and invokes the , the divine sign that turns him away from acting wrongly. But his piety reforms civic religion: a god, being good, can be the author of no evil, which condemns the Homeric tales of quarrelsome, deceitful gods. Theism, then, but moralized and rational, remote enough from ordinary worship to have been taken for unbelief.
Plato, Apology, 26b-28a, 35d (belief in the gods) · Plato, Euthyphro, 6a-c (critique of the immoral myths)
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Justification
Moral intellectualism entails a fairly optimistic view of humankind: if we do evil only through ignorance, no one is bad by nature, and every person can be improved by knowledge. Vice is not an ineradicable wickedness but a failure of knowledge, which makes the human being educable and turns examination into a therapy of the soul.
Plato, Protagoras, 345d-e; Meno, 87b-89a (virtue, an acquirable knowledge)
Justification
What decides the worth of a life is, for Socrates, the goodness of the soul and not the brilliance of appearances: ugly as a Silenus but beautiful within, he judges a man by his virtue, not by his looks. Beauty is not thereby despised: in the , the love of beautiful bodies is the first rung of an ascent that, from beauty to beauty, rises to the Beautiful and then to the Good. But this dialectic of ascent, where sensible is only a step toward the intelligible, is already Plato's work; the primacy of the ethical remains, the beautiful being worth only as a path toward the good.
Plato, Apology, 29d-30b (virtue before reputation) · Plato, Symposium, 210a-212a (the ascent of eros, from beautiful bodies to Beauty itself) · Plato, Symposium, 215a-216a (Socrates as Silenus, inner beauty)
Justification
Disappointed by the natural philosophers who explain everything by material causes, Socrates recounts having hoped from that Mind ordered the world for the best, then finding him invoking only mechanisms. What he demands is explanation by the good, the end for the sake of which it is better that things be as they are: a finalism that turns philosophy away from nature toward value.
Plato, Phaedo, 97b-99d (the disappointment with Anaxagoras)
The coherence check: the elenchus turned on yourselfExerciseInteriority
In his conversations, started from his interlocutor's opinions and pushed them to contradiction, the . Lacking a Socrates at hand, you can turn that questioning on yourself: take one of your firm convictions and look, among your own beliefs, for the one that belies it. This is the solitary form of the examined life, not to reassure yourself, but to flush out your inconsistencies and think more truly.
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The definition exercise: "what is it?"ExerciseUniversals · Status of norms (metaethics)
did not pile up examples but sought the single definition: what is courage, justice, friendship, beyond particular cases? This exercise revives that move: testing a definition against counterexamples until you tighten it. You rarely reach the perfect formula, but you discover that a word you took to be obvious is harder and richer than you thought, and you judge more finely afterwards.
- Pick a value-laden word you use often without defining it: courage, justice, respect, success, friendship.
- Write your definition in one sentence: "X is…".
- Find a case your definition wrongly includes (it is too broad), then a case it wrongly excludes (it is too narrow).
- Revise the definition to absorb both cases, then run the test again on the new version.
- Stop when you can no longer find an easy counterexample, or when you get stuck: note what the obstacle taught you about the word.
⚠ The aim is not to win a perfect definition, nor to trap the other person if you do it in pairs, but to see more clearly. The aporia, the moment you admit you could not really define the word, is a result, not a failure.
The inventory of ignoranceExerciseRelation to certainty
The only knowledge claimed was knowing that he did not know: his . This exercise turns it into a routine: on a topic where you hold strong views, separate what you can truly justify from what you merely repeat without having examined it. You gain the humility that reopens curiosity, and the freedom to stop defending positions you never really chose.
Unlock the practices
The step-by-step routine is part of Premium access: a modest contribution that supports and encourages the development of Philoscopia. Everything encyclopedic stays free and open source — this only opens the actionable practices.
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