肇論新疏 2.56

2.56

寶積，即《淨名經》長者子寶積歎佛偈言：「佛心意已滅寂也，而現行照也。」《放光》二十九云：「不動真際為諸法立處。」聖跡，教也，屬上二經。古譯句為跡，尋跡得兔如尋句得義。下論直云教跡。致一者，謂在文有異、於旨無殊。

"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.