大般涅槃經集解 20.58

20.58

案僧亮曰：因緣中道離有無，諸佛上所說有中道義味，故有問也。僧宗曰：上舉三關，明自他有過。許從乳生，理未可見。假作定有定無之難，使中道之旨顯也。

Sengliang states: The Middle Way of causal conditions is free from existence and non-existence. What the Buddhas explained above possesses the flavor of the Middle Way's principle, hence the question is asked. Sengzong states: Above, the three gates were raised to explain that self-production and other-production entail errors. Although production from milk was admitted, the principle has not yet been seen. A challenge assuming definite existence and definite non-existence is hypothetically raised in order to make the import of the Middle Way manifest.