A person's true ability does not lie in how much knowledge they have mastered, but in the choices they make. Knowledge is just a tool; it cannot determine the direction on its own. What truly determines the course of life are your cognition, judgment, and decision-making skills. How you interpret an event, how you evaluate pros and cons, and how you make trade-offs in uncertainty—these are what constitute core competencies. Looking back on your journey, you'll realize that so-called experiences are actually the result of repeated choices. What major to choose, what job to take, whom to associate with, when to persist, and when to give up—each step reflects your cognition and judgment. Therefore, the essence of ability is not "how much you know," but "how you choose." Knowledge can help you see more clearly, but what truly changes your destiny are the decisions you make at critical moments.