法界圖記叢髓錄 1.89

1.89

法記云：此中理事者，生死無性以涅槃為性，涅槃無性以生死為性，則生死涅槃之無性為理，無性之生死涅槃為事。故古人云：緣起無性，無性緣起也。緣起無性是理，無性緣起是事也。理亦真性之理，事亦真性之事，故云冥然無分別。此是十佛普賢境也。

Fa's Record states: As for 'principle and phenomena' here, saṃsāra has no nature, taking nirvāṇa as its nature; nirvāṇa has no nature, taking saṃsāra as its nature. Thus the lack of nature of saṃsāra and nirvāṇa is principle, and saṃsāra and nirvāṇa devoid of nature are phenomena. Therefore the ancients said: pratītyasamutpāda is without nature, and that which is without nature is pratītyasamutpāda. Pratītyasamutpāda without nature is principle; that which is without nature as pratītyasamutpāda is phenomena. Principle is also the principle of the true nature, and phenomena are also the phenomena of the true nature; hence it is said that they are 'dark and merged without differentiation.' This is the realm of the ten Buddhas and Samantabhadra.