Within the cosmology of Chinese medicine, human beings are regarded as microcosms of the natural universe. We are subject to the same cycles that occur in nature. Spring is a time of rebirth, sudden growth, and rapid expansion. Vital force pushes to the surface, bursting through the quiescent confinement of winter. A crescendo of excitement builds as the life process reawakens. One day the forest appears gray and lifeless, the next day sunbeams cast warm light upon branches brimming with buds.