金光明經文句記 2.340

2.340

六、「放大」下，放光表自他。以照此土光，即能照他土，可表以自行而化諸眾生。

Sixth, from "emitting great" down, emitting light represents self and other. Since the light illuminating this land can simultaneously illuminate other lands, it represents using one's own practice to transform all sentient beings.