What is dark clings to what is light and so enhances the brightness of the latter. A luminous thing giving out light must have within itself something that preserves; otherwise it will in time burn itself out. Everything that gives light is dependent on something to which it clings, in order that it may continue to shine.

-The I Ching

In Traditional Chinese Medicine Spleen Deficiency does not mean issues with the spleen as an anatomical organ. Spleen Deficiency suggests an issue with the pancreas or with digestive function. Spleen prefers a dry environment, it is prone to conditions of dampness from climate and dietary factors. It is especially sensitive to cold, damp weather and cold or raw foods, both of which are fertile ground for the pathogenic factor of dampness.

In Traditional Chinese Medicine (TCM), Phlegm is one of the pathogenic (disease causing) factors responsible for the occurrence and development of a range of disorders. Phlegm is considered as a product from disharmony of body fluids that can produce either external, visible phlegm, such as sputum secreted by the respiratory tract, or internal, invisible phlegm.

Adapting itself to obstacles and bending around them, wood in the earth grows upward without haste and without rest. Thus too the superior man is devoted in character and never pauses in progress.

- The I Ching