“Discipline Is Destiny” by Ryan Holiday, published in 2022, is a compelling exploration of the Stoic virtue of temperance, or self-discipline. Holiday illustrates how discipline is both predictive and deterministic of success, emphasizing that mastering oneself—body, mind, and spirit—is crucial for achieving one’s ambitions. The book begins with the story of Hercules and unfolds into practical advice on cultivating discipline through restraint, focus, and willpower¹.

Drawing from historical figures like Marcus Aurelius and contemporary examples like Lou Gehrig, Holiday demonstrates the transformative power of discipline in various life aspects. He concludes with 25 habits for success and advocates for instilling discipline in future generations, making it a vital read for those seeking to harness self-control for a purposeful life¹²³.