大方廣佛華嚴經隨疏演義鈔 20.8

20.8

疏「一道無量道」者，一道者，一切無礙人，一道出生死故。〈離世間品〉說：一道是菩薩道，不捨獨一菩提心故。二道是菩薩道，謂方便智慧故。三道四道乃至十道。又云：菩薩有無量道、無量助道、無量修道、無量莊嚴道，各略列十句，則萬行觸目皆菩薩道。

Regarding the commentary's statement, "the one path and the immeasurable paths": as for the "one path," it is because all unimpeded people leave birth-and-death via a single path. The "Chapter on Leaving the World" states: "The one path is the bodhisattva path, because of not abandoning the sole bodhicitta. The two paths are the bodhisattva path, namely upāya and prajñā." There are three paths, four paths, and up to ten paths. It also states: "Bodhisattvas have immeasurable paths, immeasurable auxiliary paths, immeasurable paths of cultivation, and immeasurable paths of adornment." Each briefly enumerates ten lines; thus the myriad practices that meet the eye are all the bodhisattva path.