Yin-Yang

Origin. Pre-dates textual sources; systematized in the I Ching and by Zou Yan (3rd century BCE); foundational to Chinese cosmology.

Mechanism. All phenomena contain and alternate between complementary opposites: yin (receptive, dark, cold, contracting, feminine, hidden) and yang (active, light, hot, expanding, masculine, manifest). Neither is superior; both are necessary. Each contains the seed of the other; extreme yin becomes yang, extreme yang becomes yin. Balance is dynamic, not static — health is the appropriate alternation, not the elimination of one pole.

Procedure. Identify the yin and yang aspects of the situation. Which is currently dominant? Is the dominance appropriate to the phase, or excessive? Look for the seed of the opposite within the dominant aspect — where will the reversal come? Diagnose problems as imbalance: too much yang (overextension, burnout, aggression) or too much yin (stagnation, passivity, withdrawal). Intervene by strengthening the deficient aspect or allowing the excess to transform naturally.

Applies to. Cycle analysis, burnout prevention, understanding reversals, strategic timing, any situation where extremes are self-defeating.

Limitations. The binary is flexible enough to fit any situation, which means it predicts nothing specific. Identifying which aspect is "yin" and which "yang" is interpretive. The framework describes dynamics qualitatively but provides no quantitative guidance on how much is too much.