The shape of the Dao can be most beautiful and alluring but like the shadows on a sunny day, can change dramatically. The only form that the Dao has is formless. We should learn from these facts. We grow old, we get sick, everything we come into contact with changes, we die. The only stability is change. To become attached to some shape or form is to wait for the 4:57 at the abandoned train station next to the torn up tracks where the train runs no more.