摩訶止觀 7.118

7.118

復次，若如《殃掘摩羅經》云「所謂彼眼根，於諸如來常，具足無減修，了了分明見」者，「彼」是九法界眼根也。「於如來常」者，九界自謂各各非真；如來觀之，即佛法界，無二無別。「無減修」者，觀諸眼即佛眼，一心三諦，圓因具足，無有缺減也。「了了分明見」者，照實為了了，照權為分明；三智一心中，五眼具足圓照，名為「了了見佛性」也。見論圓證，修論圓因。

Furthermore, as the Aṅgulimālīya-sūtra says: "What is called that eye faculty is, in the Tathāgatas, eternal; / Cultivated fully without decrease, / Seen clearly and distinctly." / "That" refers to the eye faculty of the nine dharmadhātus. "In the Tathāgatas, eternal": the nine realms each consider themselves not to be the real; the Tathāgata contemplates them as the Buddha-dharmadhātu, without duality and without distinction. "Cultivated without decrease": contemplating all eyes as the Buddha-eye; the three truths in a single thought-moment, the perfect cause is complete without deficiency. "Seen clearly and distinctly": illuminating the real is "clearly"; illuminating the expedient is "distinctly." The three knowledges within a single thought-moment, fully endowing the five eyes in perfect illumination, is called "clearly seeing the Buddha-nature." "Seeing" discusses the perfect realization; "cultivation" discusses the perfect cause.