大乘義章 9.57

9.57

次第四門約時辨異。此二種性，在外凡時但名佛性，不名行德。佛性有二：一法佛性、二報佛性。法佛性者是性種因，報佛性者是習種因。二性何別？法佛性者，本有法體，與彼果時體無增減，唯有隱顯、淨穢為異。報佛性者，本無法體，但有方便可生之義。此二如前佛性章中具廣分別。是二佛性，依至性地，名二種性。法佛之性轉名性種，報佛之性所生行德名為習種。是二種性，至解行中名得方便及清淨向。彼習種性，至解行中名得方便。彼性種性，至解行中名清淨向。彼得方便及清淨向，至初地上轉名二道。彼得方便轉名教道，彼清淨向轉名證道。教道至果，轉名報佛、方便菩提、方便涅槃。證道至果，轉名法佛、性淨菩提、性淨涅槃。此等雖復隨時變改，其義不殊。二種種性，辨之麁爾。

Next, the fourth section: distinguishing the differences according to time. When these two kinds of natures are at the stage of the external ordinary person, they are only called Buddha-nature, and not called practice-virtue. Buddha-nature has two kinds: first, the Dharma Buddha-nature; second, the reward Buddha-nature. The Dharma Buddha-nature is the cause of the nature-disposition, and the reward Buddha-nature is the cause of the acquired disposition. What is the difference between the two natures? As for the Dharma Buddha-nature, its substance of dharmas is originally possessed, having no increase or decrease compared with its substance at the time of the fruit, differing only in being concealed or revealed, impure or pure. As for the reward Buddha-nature, it originally lacks a substance of dharmas, having only the sense that it can be produced through skillful means. These two have been distinguished and elaborated in detail previously in the chapter on Buddha-nature. When these two Buddha-natures reach the nature stage, they are called the two dispositions. The nature of the Dharma Buddha is transformed and named the nature-disposition; the practice-virtues produced by the nature of the reward Buddha are called the acquired disposition. When these two dispositions reach the stage of understanding and practice, they are called obtaining skillful means and the pure orientation. That acquired disposition, when reaching understanding and practice, is called obtaining skillful means. That nature-disposition, when reaching understanding and practice, is called the pure orientation. When those [two], obtaining skillful means and the pure orientation, reach the first bhūmi, they are transformed and named the two paths: obtaining skillful means is transformed and named the teaching path, and the pure orientation is transformed and named the realization path. When the teaching path reaches the fruit, it is transformed and named the reward Buddha, skillful means bodhi, and skillful means nirvāṇa. When the realization path reaches the fruit, it is transformed and named the Dharma Buddha, naturally pure bodhi, and naturally pure nirvāṇa. Although these change in accordance with time, their meaning is not different. The two dispositions have thus been roughly explained.