大般涅槃經義記 9.256

9.256

自下第二明前所說眾生不解誡勸捨著。「我雖說性眾生不解」明凡不解。「佛如是等隨自意語」，舉佛獨知，成凡不解。「如是語者，後身不解，況於二乘、其餘菩薩」彰聖不解。「我往一時在耆闍」下，舉淺況深，成聖不解。

From here below, second, it clarifies that sentient beings do not understand what was previously spoken, admonishing and urging them to abandon attachment. "Although I expound the nature, sentient beings do not understand" clarifies that ordinary people do not understand. "The Buddha's speeches conforming to his own intention, such as these," by presenting the Buddha's exclusive knowledge, establishes that ordinary people do not understand. "Such words as these are not understood by one in their final body, how much less by the two vehicles and the remaining bodhisattvas" reveals that noble ones do not understand. From "Once in the past, when I was at Gṛdhrakūṭa" onwards, it cites the shallow to illustrate the deep, establishing that noble ones do not understand.