Every sensual experience, including day and night and male and female, is perceived to be a living example of the harmonious coexistence of opposite entities. In the eyes of ancient China, the black-and-white yin-yang concept represents an eternal interaction of contrarian forces extending beyond the ambiguous good and bad. While it might sound like a cliché tale of good versus evil, it is precisely in these writings where the Chinese philosophy underlying the cycle of life is cemented. It alleges that they were bred from the famous ring of yin-yang (陰陽), which instils order upon the chaotic spirit of Taiji (太極). I Ching (易經), a Chinese divination text also known as the Book of Changes, traces the roots of the Four Symbols back to the beginnings of the world.