摩訶止觀 5.194

5.194

當知二法決定，非口言、分別所能變異。本法者，如理也；自法者，證實。此義與《大經》四不可說意同。生生不可說者，本法不可說也；生隨順緣生，本法不可說也。生不生不可說者，即自斷法不可說也。不生生不可說者，即自智法不可說也。不生不生不可說者，即是究竟自證法不可說也。後二句，一結生不可說，結本法不可說也；一句結不生不可說，結自證法不可說也。

One should know that these two dharmas are definite; they cannot be changed by verbal explanations or conceptual distinctions. The original dharma is suchness as principle; the dharma of oneself is the realization of the real. This meaning is identical in intent to the four ineffables in the Great Scripture (Mahāparinirvāṇa-sūtra). 'Production-production is ineffable' refers to the original dharma being ineffable; production accords with conditioned arising, while the original dharma is ineffable. 'Production-nonproduction is ineffable' refers to the ineffability of the dharma of one's own eradication. 'Nonproduction-production is ineffable' refers to the ineffability of the dharma of one's own wisdom. 'Nonproduction-nonproduction is ineffable' refers to the ineffability of the dharma of one's own ultimate self-realization. Of the latter two phrases, one concludes that production is ineffable, which concludes the ineffability of the original dharma; the other concludes that nonproduction is ineffable, which concludes the ineffability of the dharma of one's own realization.