大方廣佛華嚴經隨疏演義鈔 2.9

2.9

疏「法門重疊，若雲起長空」者，第九託事顯法生解門。言重疊者，意顯一多不相礙故，隨一一事有多法門。以隨一事即是無盡法界，法界無盡故事亦無盡。〈迴向品〉云「此華即從無生法忍之所生起」等，意明一切因生一果，一果即具一切因故，非是託此別有所表也。

Regarding the commentary's "Dharma gates overlapping, like clouds arising in the vast sky": this is the ninth approach, relying on things to manifest phenomena and engender understanding. Saying "overlapping" is intended to show that the one and the many do not obstruct each other; hence, in accordance with every single thing, there are many Dharma gates. Because any single thing is immediately the inexhaustible dharmadhātu, since the dharmadhātu is inexhaustible, things are also inexhaustible. The "Chapter on Pariṇāmanā" says: "This flower is produced from the anutpattikadharmakṣānti," and so forth, intending to clarify that all causes produce a single fruit, and a single fruit is endowed with all causes; it is not that by relying on this, something else is symbolically indicated.