大乘百法明門論開宗義決 1.256

1.256

自心外法或有或無等者。所緣本質名為外法。心上影像名為內法。即蘊計我蘊體是有。有本質故說為或有。離蘊計我我體都無。無本質故說為或無。其心內法影像相分所有我相。心起必有。故心內法一切皆有。

"Phenomena external to one's own mind are either existent or non-existent, and so forth": The conditioned maula-ālambana is called an external phenomenon; the mental reflection is called an internal phenomenon. When grasping a self identical with the aggregates, the substance of the aggregates exists; because there is a maula-ālambana, it is spoken of as "either existent." When grasping a self separate from the aggregates, the substance of the self is completely non-existent; because there is no maula-ālambana, it is spoken of as "or non-existent." As for the internal phenomena of the mind—all marks of a self that are the reflected nimitta-bhāga—whenever the mind arises, they necessarily exist. Therefore, internal phenomena of the mind all exist without exception.