Self-knowledge (n.) was, paradoxically, a means of renouncing the self.
Self-knowledge (n.) is, for Plato, the key to an essential memory: you know yourself in order to recognize what you already knew.
Self-knowledge (n.) swallowed the care of the self whole in Plato's Alcibiades: 'take care of yourself' ended up meaning nothing but 'know yourself'.
Self-knowledge (n.) runs through the divine for Plato: to see yourself you must look at the source of thought, and that source is god.
Self-knowledge (n.) is the toll at philosophy's gate: the labour you do on yourself is what you pay to advance in knowing anything else.
Self-knowledge (n.) is, in Plato, the soul seeing itself in the mirror of the intelligible and recognizing itself there.
Self-knowledge (n.) came to the Stoic by memorizing rules; it came to the Christian penitent by violent rupture and dissociation.
Self-knowledge (n.) and care of the self are not rivals but a tangle, each calling up the other; the trouble starts when either is dropped to favour the other.
Self-knowledge (n.) is fraught. For people know what they do, and frequently they know why they do what they do, but they do not know what they do does.
Self-knowledge (n.) was only one part of an older and wider question than "know thyself": What should I do with myself, and what work must I carry out on myself?
Self-knowledge (n.) was for the ancients a consequence of caring for oneself; the modern world turned the order upside down and made it the founding principle.
Self-knowledge (n.) came packaged in the West with knowledge of things: knowing madness while becoming a rational subject, knowing illness while becoming a living one, knowing the economy while becoming a laboring one.
Self-knowledge (n.) turns, in Christianity, in a circle: the heart must be purified to understand the Word, yet the Word must be received before the heart can be purified.
Self-knowledge (n.) read on its own breeds a false history — a straight line from Plato to Husserl via Descartes, or to Freud via Augustine — when for the Greeks it never stood apart from the care of the self.
Self-knowledge (n.) became, in Christianity, not the joyful recognition of the divine within but the constant anxiety of suspicion: reading oneself for traces of the fall and of the Devil.
Self-knowledge (n.) was, in antiquity, not yet the exegesis of the soul: the ancients asked not for a new object of knowledge but for the same knowledge of the world working differently on the one who knows.