Everything has its “that,” everything has its “this.” From the point of view of “that” you cannot see it, but through understanding you can know it. So I say, “that” comes out of “this” and “this” depends on “that” - which is to say that “this” and “that” give birth to each other. But where there is birth there must be death; where there is death there must be birth.”

--Chuang Tzu,

“Discussion on Making All Things Equal”