You can talk and talk all you want, and you can share your wisdom with the whole world if you wanted to. You can be the wisest man in the world, but there is always going to be a lesson to be learned. All you have to do is listen.
When you talk you are repeating what you already know, but if you would listen then you would learn something new. You’d be surprised with what you could learn from somoeone. Everyone knows something that you don’t. Listening is learning, and learning is one of the most efficient ways to improve yourself.