In the words of Lao Tzu, "That which called Tao is evasive, elusive. Elusive, evasive, yet within it are forms. Evasive, elusive, yet within it are objects. Deep, obscure, yet within it is the essence of all."
它更是貫穿畫面、無所不在的血脈之氣；或是如老子所言：「道之為物，惟恍惟惚；惚兮恍兮，其中有象；恍兮惚兮，其中有物；窈兮冥兮，其中有精。」