“It is impossible for a man to learn what he thinks he already knows.” -Epictetus, Discourses, Book II, ch. 17
What It Means
Be it a skill, craft, or just general knowledge, to improve yourself is to learn. But you cannot learn if you believe there is nothing left for you to learn. What if what you know is only one of many possibilities, and some are better than others? What if what you know could be further enhanced by what others know? What if what you know is actually wrong?
No matter what you pursue in life, keep yourself hungry to learn. Choose to always have a beginner’s mind, constantly looking for another angle. Get comfortable with being wrong, and relish it when it happens. It’s okay to be wrong as long as you make it a lesson.