大乘起信論別記 1.62

1.62

「一念相應」者，是無間道。如《對法論》云「究竟道者，謂金剛喻定。此有二種：謂方便道攝、無間道攝。」此之三句，明能覺也。言覺心初起者，是明所覺也。

"Conforming in a single thought-moment" is the path of uninterrupted [concentration] (ānantarya-mārga). As the Abhidharmasamuccayavyākhyā says: "The ultimate path is the diamond-like samādhi. This has two kinds: that subsumed under the path of expedient means, and that subsumed under the path of uninterrupted [concentration]." These three phrases clarify the one capable of awakening. Saying that "awakening to the initial arising of the mind" clarifies that which is awakened to.