Athletes and the people who coach them may be unfamiliar with stoicism, but they are stoics. They endure pain or hardship without feeling or complaint. They control what they can control. They talk ad nauseam about controlling only what they can control. They’re on to Cincinnati. They stay in the moment, and take things one game at a time. And by doing that, they are voicing a philosophy—living a philosophy, training under a philosophy—without knowing of or understanding it. ... “Stoicism as a philosophy is really about the mental game,” Holiday said. “It’s not a set of ethics or principles. It’s a collection of spiritual exercises designed to help people through the difficulty of life. To focus on managing emotion; specifically, non-helpful emotion.” ... this was the exact kind of stuff they were exploring—not how to hit better, or pitch better, but how to sleep better and travel better and recover better and think better. That made the connection between the book and the sports world clearer. ... “Stoicism is the distinction between what you can control and what you can’t,” Holiday said.
Way back in A.D. 6, during the expansion of the Roman Empire along the Danube and into present-day Germany, the future emperor Tiberius reached this spot and established a winter encampment. Carnuntum, as the camp would be called, flourished under the protection of the legions and became a center of the amber trade. The army and townspeople lived apart, but in symbiotic amity. ... During its second-century prime, Carnuntum was a key Roman capital of a province that spanned the landmass of what is now Austria and much of the Balkans. The frontier town boasted a burgeoning population and a gladiator school whose size and scale was said to rival the Ludus Magnus, the great training center immediately to the east of the Colosseum in Rome. Toward the end of the glory days of the Roman realm, the emperor Marcus Aurelius held sway from Carnuntum and made war on Germanic tribes known as the Marcomanni. There, too, his 11-year-old son, Commodus, likely first witnessed the gladiatorial contests that would become his ruling passion. ... Though archaeologists have been digging and theorizing at the 1,600-acre site on and off since the 1850s, only remnants survive—a bath complex, a palace, a temple of Diana, the foundations of two amphitheaters (one capable of holding 13,000 spectators) and a monumental arch known as the Heidentor (Heathens’ Gate) that looms in battered splendor at the edge of town.