Wisdom is central to a meaningful life. It gives us perspective, reveals knowledge and guides our path. Without it, our best qualities become our worst: courage turns to foolhardiness, self-discipline to cruelty, justice to empty moralising. We all aspire to be wise - but wisdom is earned. In this fourth and final instalment of his bestselling Stoic Virtues series, Ryan Holiday uncovers tried and true methods for cultivating wisdom. Drawing on lessons from heroes across history, including Marcus Aurelius, Abraham Lincoln, Maya Angelou and Joan Didion, he shows how to keep an open mind in times of division and disruption; to listen more than we talk; to think with nuance and ruthlessly question our own beliefs. Through cautionary figures like Elon Musk, he shows how dangerous intelligence can be without wisdom - and how we can all escape today's traps of tribalism, certainty and self-righteousness. Are you open to listening? Are you willing to question? Are you here to learn? Wisdom is work. But it's worth it.