Tao Te Ching

“The principle of leveling of all opposites, and the theory of cycles and universal reversion to opposites are basic for the understanding of Lao Tzu and Chuang Tzu philosophy and its practical teachings. All Lao Tzu's paradoxes arise from this point of view.”

— Lín Yǔtáng 林語堂 1895 – 1976 CE
from Wisdom of Laotse