Not a headline act, but a backstage genius. Theon of Smyrna (fl. 2nd century CE) wrote the ultimate user’s guide to Plato — a crash course in math, music, and astronomy for readers who needed help keeping up with the Timaeus. Numbers, ratios, cosmic harmonies — Theon saw it all as part of one grand philosophical mixtape. He didn’t claim originality, just clarity — and honestly, that’s what makes his work still sing. Quiet mind, loud cosmos.