起信論註 1.9

1.9

[Treatise:] What are the two? The first is the aspect of the mind as tathatā; the second is the aspect of the mind as arising and ceasing. [Commentary:] This lists the two aspects. That which is identical to the essence and transcends marks is called the aspect of tathatā; that which changes and moves following conditions is called the aspect of arising and ceasing. Although the essence has no difference, their meanings differ. Because of the difference in meaning, they are spoken of as "aspects". (Answer: Tathatā and arising and ceasing, in their entirety, are of one meaning. If arising and ceasing are taken, there are two aspects; hence they are spoken of as aspects.)