大般涅槃經集解 70.45

70.45

案僧亮曰：難意謂若以無煩惱為無，而涅槃非無。牛形馬為異，無牛亦無三，無皆無常也。

Sengliang states: The intent of the objection means: if you take the absence of defilements as non-existence, yet nirvāṇa is not non-existent. A cow's form and a horse's are different; without the cow, there is also the absence of the three [others], and all non-existences are impermanent.