《庄子·外篇·知北游》
人们所说的盈满、空虚、衰退、减损，认为是盈满或空虚而并非真正是盈满或空虚，认为是衰退或减损而并非真正是衰退或减损，认为是宗本或末节而并非真正是宗本或末节，认为是积聚或离散而并非真正是积聚或离散。 
不际之际，际之不际者也。谓盈虚衰杀，彼为盈虚非盈虚，彼为衰杀非衰杀，彼为本末非本末，彼为积散非积散也。 
What people call fullness, emptiness, decay, and depletion; thinking of fullness or emptiness and not truly experiencing fullness or emptiness, thinking of decay or depletion and not truly experiencing decay or depletion, thinking of the root or the branch and not truly experiencing the root or the branch, thinking of accumulation or separation and not truly experiencing accumulation or separation.