The眞 is intp. as 眞實 the real, 如 as 如常 thus always or eternally so; i.e. reality as contrasted with 虛妄 unreality, or appearance, and 不變不改 unchanging or immutable as contrasted with form and phenomena. It resembles the ocean in contrast with the waves. It is the eternal, impersonal, unchangeable reality behind all phenomena. bhūta is substance, that which exists; tathatā is suchness, thusness, i.e. such is its nature. The word is fundamental to Mahāyāna philosophy, implying the absolute, the ultimate source and character of all phenomena, it is the All. It is also called 自性淸淨心 self-existent pure Mind; 佛性 Buddha-nature; 法身 dharmakāya; 如來藏 tathāgata-garbha, or Buddha-treasury; 實相 reality; 法界 Dharma-realm; 法性Dharma-nature; 圓成實性 The complete and perfect real nature, or reality. There are categories of 1, 2, 3, 7, 10, and 12 in number: (1) The undifferentiated whole. (2) There are several antithetical classes, e.g. the unconditioned and the conditioned; the 空 void, static, abstract, noumenal, and the 不 空 not-void, dynamic, phenomenal; pure, and affected (or infected); undefiled (or innocent), i.e. that of Buddhas, defiled, that of all beings; in bonds and free; inexpressible, and expressible in words. (3) 無相 Formless; 無生 uncreated; 無性 without nature, i.e. without characteristics or qualities, absolute in itself. Also, as relative, i.e. good, bad, and indeterminate. (7, 10, 12) The 7 are given in the 唯識論 8; the 10 are in two classes, one of the 別教 cf. 唯識論 8; the other of the 圓教, cf. 菩提心義 4; the 12 are given in the Nirvana Sutra.