Everything can be a "that"; everything can be a "this." One man cannot see things as another sees them... Therefore it is said "That" comes from "this" and "this" comes from "that" - which means "that" and "this" give birth to one another.

Translated by Gia-Fu Feng and Jane English, Chuang-Tzu: Inner Chapters, Chapter Two (p. 29), Alfred A. Knopf. 1974