This paper focuses on the notion of “mental consciousness simultaneous with five sensory consciousnesses” (henceforth abbreviated as MSF) preserved in the Chinese Yogācāra sources. I argue that this notion was crucial for better understanding Dignāga’s epistemology but it was totally forgotten by Dharmakīrti’s time.
I begin by arguing that Dignāga’s notion of mental perception (mānasa-pratyakṣa) can be made sense by taking MSF into consideration. I further suggest that MSF is closely related to the notion of mental construction by the nature [of the five sensory consciousness] (svabhāva-vikalpa) in the Abhidharma tradition. Finally, I show how MSF could help shed light on Dignāga’s notion of self-cognition (svasaṃvedana).
In conclusion, the importance of the Chinese sources is that they preserve the relevant context before and around the time of Vasubandhu, Dignāga and Dharmapāla. By carefully studying the Chinese pramāṇa sources, we see the continuity between Dignāga and his Abhidharma and Yogācāra predecessors.