You are never a finished product. You are always becoming!
The beauty of learning is that no matter where you are in your journey, you can still get better. Lionel Messi has been the world’s best footballer (soccer player) for the past four years but he can still get better. At the end of the day, you will never know it all but the aspiration to get better keeps you going.
Similarly, wanting to share what you have learned forces you to learn the skill well. As you keep on sharing, you keep on learning the skill better. You get better at your teaching as you get better at your skill.
When you master a habit through years of trial and error, you become a great teacher of that skill. You are able to show people what works and what does not work and the most effective way of learning that skill.
The beauty of life is that you never know it all and you are never a finished product. You are always improving!