The Tao Teh King

The Tao which can be expressed is not the unchanging Tao; the name which can be named is not the unchanging name.

The nameless is the beginning of the Heaven Earth; the mother of all things is the nameable.

Thus, while the eternal not-being leads towards the fathomless, the eternal being conducts to the boundary. Although these two have been differently named they come from the same.