A ncient Greek philosophers were fond of the aphorism, “know thyself,” inscribed above the entrance of one of the Temples of Apollo at Delphi. One expression of this tradition, variably attributed to Socrates and Plato, is that “the unexamined life is not worth living.” Another, attributed to Aristotle, is “to know thyself is the beginning of wisdom.” And, according to Socrates, the path to such self-knowledge is through inner reflection, or what we now call introspection.
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