Self-knowledge (n.) is attainable only through art, for it is art, and art only, that reveals us to ourselves.
Self-knowledge (n.) is available only to the superficial. Only the shallow know themselves.
Self-knowledge (n.) is impossible and undesirable — only the shallow know themselves.
Self-knowledge (n.) is, in one sense of the word, necessary, as the Greek oracle said: it is the first achievement of knowledge. But to recognise that the soul of a man is unknowable is the ultimate achievement of wisdom.
Self-knowledge (n.) was the command written over the portal of the antique world, "Know thyself." Over the portal of the new world, "Be thyself" shall be written.