Learning is like the horizon; there is no limit, there is always farther to go. Yet most people act as though learning was a short cab ride to the next block or two. If we stop learning, we stop advancing. We become stagnant. There is an old Chinese saying about not worrying about whether you are going slow, just worry about standing still. These words are most truthful. No matter how much you think you know about the Dao, you are merely scratching the surface; you have but a small piece in an infinite puzzle.