Know Thyself — Γνῶθι Σεαυτόν

Picture this: it's the 6th century BCE, ancient Greece. You've walked for days to reach Delphi — the most sacred place in the Greek world. Here stands the temple of Apollo, god of light and prophecy. Inside sits a priestess called the Pythia, believed to speak with the voice of the god himself. You've come with a question that could change your life. But before you step through the entrance, you look up — and there, carved into the stone, are two words: Γνῶθι Σεαυτόν — "Know Thyself."