In Chinese culture, 四季 is not just a meteorological division of the year; it's a foundational worldview. This concept is central to Daoist philosophy, which emphasizes harmony with the natural flow (the Dao). The transition of the seasons is a perfect manifestation of the interplay between
阴阳 (yīnyáng)—the dark, cool, passive yin (autumn, winter) giving way to the bright, warm, active yang (spring, summer), and back again in a continuous cycle.