The myriad things are created and transformed out of the two material forces and the Five Agents. These Five Agents are the basis of their differentiation while the two material forces constitute their actuality. The two forces are fundamentally one. Consequently, the many are [ultimately] one and the one is actually differentiated in the many. The one and the many each has its own correct state of being. The great and the small each has its definite function.

(Chow Tun-i)