大乘百法明門論解 1.48

1.48

In Chinese this is rendered as 'mental consciousness' (意識). Just as the storehouse consciousness is named consciousness [because] it is itself the mind (citta), [so this seventh is consciousness because] it is itself the manas (意). The sixth, mental consciousness (mano-vijñāna), is like the eye-consciousness being named consciousness [because] it is different from the eye [faculty]; [similarly it is different from the manas]. However, the various holy teachings, fearing that this [seventh] would be confused with that [sixth], only established the name 'manas' for the seventh; furthermore, it is to distinguish it from citta and vijñāna, since its accumulating and discerning are inferior to the other consciousnesses; or else, desiring to show that this [seventh] serves as the immediate basis for that mental consciousness [of the sixth], they merely established the name 'manas'.