Unnamed, the beginning of heaven and earth, named, the mother of all things. Tao can be said, very Tao, and names can be named. The very name comes from Laozi's "Tao Te Ching", which is one of the essences of Taoist philosophical thought. The next sentence is nameless, the beginning of heaven and earth, and name, the mother of all things. It means: Tao cannot be expressed in words. If it can be expressed in words, it is not the real Tao. Names can be named, but the true name cannot be expressed in words. Nameless is the beginning of heaven and earth, and name is the origin of all things.