It is the Tao as it manifests itself on the level of living bodies

First, as to creation : if a human mind can directly influence matter not merely within, but even outside its body, then a divine mind, immanent in the universe or transcendent to it, may be presumed to be capable of imposing forms upon a pre-existing chaos of formless matter, or even, perhaps, of thinking substance […]

Distinguish clearly these bitter yet fertile human truths, flesh of our flesh, and admit them heroically

Distinguish clearly these bitter yet fertile human truths, flesh of our flesh, and admit them heroically:

the mind of man can perceive appearances only, and never the essence of things; and not all appearances but only the appearances of matter; and more narrowly still: not even these appearances of matter, but only relationships between them; […]