人，生于五行，便立于五行
When the world is not divided, it is called a state of chaos. The heavens, the earth, and the universe are mixed together, the sun, moon, and stars are not formed, the day and night are not alternately hot and cold, there are no wind, rain, thunder, and lightning above, and there are no plants, trees, mountains, rivers, people, birds, insects, and animals below. At this time, a wave of spiritual energy is consolidating and moving inside, so water is born from Taiyi, fire is born from Taishi, wood is born from Taishi, metal is born from Taisu, and earth is born from Taiji. The five elements come from this.
秋天属金，内敛，收缩，稳固。
春天属木，花草树木生长茂盛，树木的枝条向四周伸展，养料往枝头输送，代表向上与生长。
冬天属水，水之道，利万物而不争，水往低处流，冬天万物休眠，为春天蓄积养料。
夏天属火，向上生长，长势迅猛，淬炼，燃烧，激情四射。
长夏属土，长夏是夏和秋之间的一段过度期，承载、受纳。
天若无土，就不能覆盖大地；地若无土，就不能承受地上万物，人若无土，就不能自然繁衍而五常不立。因此天地人不可无土。
