Man Conquers The World By Conquering

This saying is attributed to Zeno of Citium, the founder of Stoicism, in Diogenes Laertius's Lives of the Eminent Philosophers (Book VII). The Stoic concept of self-mastery (enkrateia) held that the wise person's authority over their own impulses and judgments was the only true form of power — external conquest was irrelevant if the conqueror remained enslaved to passion and desire. Musonius Rufus, Epictetus, and Marcus Aurelius all restated this principle, making self-governance the defining task of Stoic practice.