四明尊者教行錄 3.167

3.167

答：原夫四諦而不減三又不增五者，蓋藥病相對，因果義足故。而台宗以是對四教者，莫不攝偏圓含二理，一期化道始終備矣。藏通則詮界內真諦，別圓則詮界外中道。又理雖二種，而教分四殊。藏通為界內巧拙，別圓為界外巧拙。又前二詮真，真理不殊；別圓詮中，中分但不但。藏通所有諸法皆由業惑搆造，別圓所有諸法皆佛性變造。通稱為諦者，諦是審實為義，又是諦了為義。此並總示，後更別陳。

Answer: Originally, the reason the four truths are neither reduced to three nor increased to five is that medicine and illness correspond to each other, and the meaning of cause and effect is complete. When the Tiantai school matches them with the four teachings, it encompasses both the biased and the perfect and contains the two principles; the whole course of transforming and guiding beings, from beginning to end, is fully provided. The Tripiṭaka and common [teachings] explain the ultimate truth within the realms; the distinct and perfect [teachings] explain the middle way beyond the realms. Furthermore, although the principle is of two kinds, the teachings are divided into four distinctions. The Tripiṭaka and common are the clumsy and skillful within the realms; the distinct and perfect are the clumsy and skillful beyond the realms. Moreover, the former two explain the ultimate, and the ultimate principle does not differ; the distinct and perfect explain the middle, and the middle is divided into the exclusive and non-exclusive. All phenomena in the Tripiṭaka and common are constructed through karma and delusion; all phenomena in the distinct and perfect are transformed and constructed by the buddha-nature. They are universally called 'truths' because 'truth' carries the meaning of being examined and real, and also carries the meaning of clear discernment. These are general explanations; they will be set forth individually below.