The Dao cannot be called by name. This is good for us to remember as a story mentions that a master once told a student that “If someone calls your name and you do not turn to look, you have accomplished something.” Neither can the Dao be remembered by shape. Even though it is invisible, it makes its presence known. You cannot stop the Dao, and you cannot hope to even contain it. It is the river that rises above any banks you may try to stop it with. Names and shapes are conveniences, not truth. The times as well as the shape of the Dao are always a-changing.