大般涅槃經義記 10.73

10.73

自下第二明空異法。「空無是法是故名無」明空是無。「若有離」下，破有顯無。先破其有，却顯其無。以諸外道計空為有，故先破遣。於中合有十一復次：初一約就非色心法破空是有，次一約心破空是有，後九約色破空是有。

From here below is the second point: clarifying that space is different from the phenomenon. "Space is devoid of these dharmas, and therefore is called non-existent" clarifies that space is non-existent. From "If there were, apart from..." onward refutes existence to reveal non-existence. It first refutes its existence and then reveals its non-existence. Because various non-Buddhists conceptualize space as existent, it is first refuted and dismissed. Here there are eleven turns in total: the first refutes the existence of space in terms of dharmas that are neither form nor mind; the next refutes the existence of space in terms of mind; the remaining nine refute the existence of space in terms of form.