大般涅槃經集解 65.26

65.26

案僧亮曰：若有性者，性不可壞；以其無性，名不牢固。名為虛空者，無性無法、無法有用，與虛空同性，即以為名也。食下迴轉者，說一切音聲兩有相尋，食不得下、音聲不發，以無一有食下聲發，說空之用也。或者聞空有用，謂有空法，法入色入攝也。

Sengliang states: If it had an intrinsic nature, its nature could not be destroyed; because it has no intrinsic nature, it is called unstable. As for being named space: having no nature and no phenomena, yet nonexistent phenomena having a function, its nature is identical with space, so it is named accordingly. Regarding food going down and circulating: it says that when all sounds and the two existences follow each other, food cannot go down and sound does not issue forth; because absence of the one allows food to go down and sound to issue forth, this speaks of the function of space. Deluded people, hearing that space has a function, claim that there is a phenomenon of space, subsumed under the sphere of mental objects or the sphere of form.