涅槃經遊意 1.45

1.45

又，彼明常無常云：斷明義，生死「無常」不通「常」；涅槃「常」不通「無常」。乃至金剛心無常不通「常」，佛果常不通「無常」。

Furthermore, when they clarify permanence and impermanence, they say: In terms of cutting-off clarification, the "impermanence" of saṃsāra does not connect to "permanence"; the "permanence" of nirvāṇa does not connect to "impermanence". Up to the vajra-like mind, impermanence does not connect to "permanence", and the fruit of buddhahood as permanence does not connect to "impermanence".