瑜伽論記 8.321

8.321

護月義中亦有二說，一解，本性種姓未有習成，地前有漏現行果時名細，成有漏果時名麁，與現心俱故，是即本有無漏增上緣故，發菩提心果，第二說，地前姓習二種未有習成，登地已上無漏心果說名為細，若成無漏心方名為麁，與無漏心果俱故。

In Candragupta's doctrine there are also two explanations. One explanation: when the original natural gotra has not yet been accomplished through cultivation, at the time of the active fruit with taints prior to the stages, it is called subtle; when the fruit with taints is accomplished, it is called coarse, because it is concurrent with the active mind; that is, on account of the sovereign condition of the original taintless [seeds], it is the fruit of generating the bodhicitta. The second explanation: prior to the stages, when the two kinds, gotra and cultivation, have not yet been accomplished through cultivation, the fruit of the taintless mind upon ascending the stages and above is spoken of as subtle; only when the taintless mind is accomplished is it called coarse, because it is concurrent with the fruit of the taintless mind.