Modern popularizations of Stoicism, which ignore physics, diverge from the historical understanding of Stoicism in a dramatic way to accommodate a secular worldview. Unfortunately, such departures strip Stoicism of its soul. What remains is often only a shell of the deeply spiritual, philosophical system which inspired the lives, writing, and teaching of Stoics like Seneca, Epictetus, and Marcus Aurelius. Stoicism is a holistic philosophical system, and it takes only a minimal amount of time and effort to discover that scholars...