成唯識論演祕 5.497

5.497

詳曰：《疏》意說云：疑無苦果方與喜俱，上無此疑，由上無造彼惡行故，故疑，苦無，方喜俱者，但在欲界不障上界，疑得喜俱。下麁相中，《疏》言上界疑有喜故，自義既立，他計便遮，不言成矣。此自不得《疏》之本意，非《疏》不得論之意也。

In detailed evaluation: The Commentary's intent is to state that only doubt that lacks painful fruit coexists with joy; above there is no such doubt, because above one does not perform those evil deeds. Therefore, the doubt that lacks suffering and only then coexists with joy exists only in the desire realm, and does not obstruct doubt in the higher stages from being able to coexist with joy. In the coarse aspects below, the Commentary states that doubt in the higher stages has joy; once one's own position is established, the other's assertion is thereby refuted, and it is accomplished without speaking. This critic has himself failed to grasp the Commentary's original intent, rather than the Commentary failing to grasp the Treatise's intent.