止觀輔行傳弘決 9.7

9.7

次明互發不同中，初文中云「八種」者，前陰境中九雙七隻，七隻但是義攝十境，三障四魔不出十故。故今不論三障四魔，於九雙中又除作意。前以九境對於陰境，陰境作意修習，煩惱下九咸是任運發得。今唯發得，是故不論，故十雙中但唯八種。故知九境唯不作意，無可對故，故全不列。

Next, in explaining the differences in mutual manifestation, where the initial text speaks of "eight kinds": previously, within the object of the aggregates, there were nine pairs and seven singletons. The seven singletons merely conceptually subsumed the ten objects, because the three obstacles and four Māras do not exceed the ten. Therefore, the three obstacles and four Māras are not discussed here, and among the nine pairs, deliberate intention is also excluded. Previously, the nine objects were paired against the object of the aggregates: the object of the aggregates is cultivated with deliberate intention, whereas defilements and the remaining nine below all manifest spontaneously. Here they only manifest; therefore they are not discussed, so among the ten pairs there are only eight kinds. Thus we know that the nine objects are only non-deliberate intention, having nothing with which to form a pair; hence they are not listed at all.