Wilhelm judgement Wilhelm name A set of first-order constants interpreted as elements of a set of primordial forces defined by axioms on the (Zhou Yi) symbols which are written characters with a structural form that 'illustrate' the forces underlying all natural phenomena Vertically symmetric gua The images set forth by the sages (FuXi and King Wen) that signify natural phenomena Symbol Paired gua inverse gua King Wen of Zhou 周文王 King Wen order 伏羲 Fu Xi Hexagram / gua Trigram Symbol for Primary energy The fundamental natural phenomena signified by the images / signs in the YiJing Natural phenomenon