Heraclitus lived around 500 BCE in the Greek city of Ephesus, and he saw something most people miss: nothing ever truly stands still. Rivers flow. Fires burn. Lives change. Even the things that look solid are only holding their shape for a while. Heraclitus wrote in sharp, almost cryptic fragments, not essays, which earned him the nickname the Dark Philosopher. But beneath the mystery was a clear idea—reality is not made of fixed things, but of processes in motion. Order still exists, he argued, but it comes from tension and balance, not permanence. Two and a half millennia later, physics quietly agrees.