大般涅槃經義記 6.195

6.195

第三段中，文別有四：一如來立喻反問迦葉「有人說言我能渡海，可思議不」，迦葉答佛明其不定，若阿修羅渡則可思、人渡不思，「或思、不思」略以答之。「何以」下釋，此明修羅能渡可思，喻佛如來能渡可思。

In the second passage [addressed here], the text distinctively has four points: first, the Tathāgata sets up an analogy and asks Kāśyapa in return: "If someone were to say, 'I can cross the ocean,' is that conceivable or not?" Kāśyapa replies to the Buddha, clarifying that it is not fixed: if an asura crosses, it is conceivable; if a human crosses, it is inconceivable; he answers briefly with "It may be conceivable or inconceivable." From "Why?" downward explains it: this clarifies that an asura's ability to cross is conceivable, which analogizes that the Buddha, the Tathāgata's, ability to cross is conceivable.