Therefore humans must have a relationship with Five Elements or be like them. As there are affinity and enmity relationships among the Five Elements, there must be similar relationships among humans. For example, trees have their own growth cycle in between Heaven and Earth. Humans must have life cycles similar to those of trees. The seasonal changes affect the growth of trees.
Trees grow faster in the spring and slower in the fall.
The environmental changes also affect the life of trees. Without adequate sunshine, trees grow too slowly. Too much heat, trees will be dried out. Without water, trees cannot grow. Too much water, trees will be uprooted and afloat.