滴天髓闡微

Elucidation of the Dripping Heaven Marrow

任鐵樵 (Ren Tieqiao, commentary) · Qing (original text attributed to 京圖, Song)

The most revered theoretical treatise on Four Pillars analysis. Terse root verses with Ren Tieqiao's extensive Qing-era commentary exploring the philosophical foundations of balance, strength, and the interplay of the Five Phases in destiny reading.