The world evolves at a pace that often outstrips our beliefs and skills, leaving many experts relying on outdated knowledge. This poses a serious risk, as sticking to old expertise can stifle progress. While some principles remain timeless, most knowledge has a limited lifespan, requiring us to adapt continuously. This is true across various fields, from investing and technology to government policy. What was once deemed foolish can become wise, and vice versa. Therefore, it’s crucial to balance enduring principles with a readiness to adjust to changing circumstances.