起信論疏筆削記 9.20

9.20

佛性下，三、引論釋成。彼論所說，一一有為莫不皆為四相所遷，以證今論一期四相。

"The Foxing..." below: Third, adducing a treatise to explain and establish it. That treatise states that there is no saṃskṛta phenomenon that is not altered by the four marks, in order to prove the four marks of a single period in the present treatise.