大方廣佛華嚴經隨疏演義鈔 2.5

2.5

疏「一多無礙，等虛室之千燈」者，第五一多相容不同門。由一與多互為緣起、力用交徹，故得互相涉入，是曰相容。不壞其相，故云不同。如一室內千燈並照，燈隨盞異，一一不同；燈隨光遍，光光涉入，常別常入。經云「一中解無量，無量中解一。了彼互生起，當成無所畏。」此之燈喻，亦可喻於相即。直就光看，不見別相，唯一光故。

Regarding the commentary's "The one and the many are unobstructed, equal to a thousand lamps in an empty room": this is the fifth approach, the mutual containment of the one and the many without identity. Because the one and the many are mutual conditions for arising and their dynamic functions mutually penetrate, they can mutually interpenetrate; this is called mutual containment. Not destroying their characteristics is why it says "without identity." Like a thousand lamps shining together in a single room: the lamps differ according to their basins, each and every one being distinct; the lamps pervade according to their light, light and light interpenetrating, constantly distinct and constantly entering. The sūtra says: "Within the one, understand the measureless; within the measureless, understand the one. Comprehending their mutual arising, one will attain fearlessness." This metaphor of the lamps can also serve as a metaphor for mutual identity. Looking directly at the light, one does not see distinct characteristics, because there is only a single light.