仁王般若經疏 2.119

2.119

"Great King! Bodhisattva-mahāsattvas, while within the ultimate truth, constantly illuminate the two truths to convert sentient beings; the Buddhas and sentient beings are one and not two. Why is this? Because the emptiness of sentient beings allows for establishing the emptiness of bodhi, and because the emptiness of bodhi allows for establishing the emptiness of sentient beings, and because the emptiness of all phenomena is the emptiness of emptiness. Why is this? Prajñā is devoid of characteristics; the two truths are empty. Prajñā empties everything from ignorance up to sarvajñā, because it has no self-characteristic and no other-characteristic."