涅槃經遊意 1.214

1.214

「常」不見別名數，直明常而恒耳——但無常有二種：一生滅，二流動——對生滅故言常，流動故言恒也。

'Permanence' shows no distinct enumeration; it simply clarifies being permanent and enduring—yet impermanence has two kinds: first, arising and ceasing; second, flux—corresponding to arising and ceasing, it is called permanent; corresponding to flux, it is called enduring.