成唯識論演祕 6.636

6.636

以上品貪而為取支，故云愛增，非轉愛支以成上品為取支故名為愛增，由斯取等名為獨相。

Because high-grade passion serves as the grasping branch, it is said that craving increases; it is not that the branch of craving transforms to become high-grade and constitutes the grasping branch, which is why it is called the increase of craving. Therefore grasping and the rest are termed unique aspects.