肇論新疏 2.56

2.56

"Ratnakūṭa" refers to the verse in the Vimalakīrtinirdeśa where the elder's son Ratnakūṭa praises the Buddha, saying: "The Buddha's thought and mind are already extinguished"—this is quiescence—"yet he displays activity"—this is illumination. Fascicle 29 of the Pañcaviṃśatisāhasrikā-prajñāpāramitā-sūtra says: "Without moving from the limit of reality, it is the standing place of all phenomena." "The sage's traces" refers to the teachings, belonging to the above two sūtras. In ancient times, sentences were translated as "traces"; tracking the traces to catch the hare is like examining the sentences to obtain the meaning. In the treatise below it directly calls them "traces of the teachings." "Purport is one" means that while they differ in phrasing, they are not different in their intended purport.