13 Things Mentally Strong People Don't Do

Long before the rise of modern business strategy, the Roman philosopher and statesman Seneca forged the ultimate mindset for leadership in a world of volatility. Letters from a Stoic is not a book of abstract philosophy; it is a direct, practical guide to building the mental fortitude required to thrive in the chaotic arena of entrepreneurship. Through a series of personal letters to a friend, Seneca provides a masterclass in managing the very pressures that define the founder's journey: handling immense stress, making clear-headed decisions amid uncertainty, and distinguishing between trivial distractions and what truly matters. He teaches you to separate what you can control from what you cannot—the most critical skill for navigating market downturns, team conflicts, and personal doubt. For the entrepreneur seeking not just financial success but a durable and meaningful career, Letters from a Stoic is an essential mentor, offering timeless wisdom on building a venture—and a life— that can withstand any storm.