大般涅槃經義記 6.115

6.115

喻中，先明眾生心識無相而有，以類道等真法是有。此文良驗，宜審記知。「以是義」下舉說證成，於中初明心如城主，次明須護，先反、後順。「以不護」下明護有益，先反、後順。下雙結之，「得名真實」結明前益，「護者得彼人天涅槃名為真實」。「不護不得名不真實」，結明前損。

In the analogy, it first explains that the mental consciousness of living beings is markless yet existent, using this to draw a parallel to the real dharmas such as the Path being existent. This text provides genuine verification and should be carefully noted and understood. From "By this meaning" onward, it cites teachings to corroborate and establish it. Therein, it first explains that the mind is like the master of a city, and next explains that it must be guarded, first in reverse and then in direct sequence. From "Because of not guarding" onward, it explains that guarding brings benefit, first in reverse and then in direct sequence. Below, it concludes both: "attaining what is called the real" concludes by clarifying the aforementioned benefit—"one who guards attains that nirvāṇa of humans and devas, which is called real"; "failing to guard and not attaining is called not real" concludes by clarifying the aforementioned harm.