仁王護國般若波羅蜜多經疏 3.292

3.292

解曰：雖常修勝義等者，釋疑難也。謂此已前所修勝行皆順勝義，當何所生？雖常修習皆順勝義，由感三界分段生死，習種未已、未離相縛，故所修行生三界也。經言三界，總相而明，多唯欲界，如次當悉。從此第二徵其所以。

Explanation: Regarding 'although always cultivating the paramārtha…' and so forth: this resolves a doubt and objection. That is to say: prior to this, the superior practices cultivated all accorded with the paramārtha; where should they take rebirth? Although always cultivating in accord with the paramārtha, because they produce fractioned saṃsāra in the three realms, the habit-lineage is not yet ended, and they have not yet departed from the bondage of characteristics, the practices cultivated therefore produce [rebirth in] the three realms. When the sūtra speaks of the 'three realms', it explains in general characteristics; mostly it is only the desire realm, as will be understood in due order. Next, the second [part] inquires into the reason.