仁王護國般若波羅蜜多經疏 2.578

2.578

解曰：般若無相者，能照智空。二諦皆空者，生死涅槃彼二皆空。從此第四結境智空。於中分二：且初第一智因果空。

Exposition: Regarding 'Prajñā is signless': the cognition that is able to illuminate is empty. Regarding 'the two truths are both empty': saṃsāra and nirvāṇa—both of those are empty. From here, the fourth part concludes the emptiness of object and cognition. Within this there are two parts; first is the emptiness of the causes and fruits of cognition.