《混元陽符經》

The Hunyang Yangfu Jing (Scripture of the Primordial Yang Talisman) describes the process of energy circulation and mind-body transformation in Daoist cultivation:

The opening passage depicts the primordial state of undifferentiated chaos—where darkness and light interact without fixed form, and the pure original Qi (vital energy) remains in a state of pristine simplicity. When the ritual talismans (Fulu) circulate, shadow-like existences return to stillness, requiring the practitioner to sever distracting thoughts and consolidate the ethereal soul (Hun) and corporeal soul (Po).

The text describes the dramatic fluctuations of internal energy (Qi) during cultivation: at times surging like uncontainable wildfire, at others flickering like twilight spirit-light. In advanced stages, the "black essence" (Jing from the kidneys) and blood nourish the five viscera, while the "Fire Sovereign of the Spirit Talisman" (heart fire) ascends to irrigate the brain and refine marrow.

The crucial method involves guarding the "Gate of Life" (Dantian region) and mobilizing storm-like energy through specialized breathing techniques. The scripture emphasizes holding to the root, progressing through the "three transformations" (quantitative changes) and "nine transformations" (qualitative changes) of cultivation, ultimately reaching the "ultimate spirit" (Jishen) state.

The practice methodology draws parallels to Yu the Great's flood control—channeling energy by emulating celestial movements. By taking the "Yang Talisman" (symbol of yang energy) as the cultivation core, one maintains constancy amidst infinite transformations, transcending kalpic cycles to achieve enduring existence.

(Note: This passage contains specialized Neidan (internal alchemy) terminology describing advanced Daoist practices involving breath regulation and intentional guidance of internal energy flows.)