大方廣佛華嚴經隨疏演義鈔 21.18

21.18

疏「道無不通則自他引攝」者，第三開門引攝義。道無不通，言含二意：一理即是道，無不通故，即開門引攝。二行契於道，則無所不通，故能引攝二利之行。

Regarding the Commentary's stating that "the path being universally unobstructed, one guides and gathers oneself and others," this is the third meaning of opening the gates to guide and gather. That "the path is universally unobstructed" contains two senses: first, principle is itself the path, and because it is universally unobstructed, it opens the gates to guide and gather; second, when practice accords with the path, there is nothing it does not penetrate, and thus it can guide and gather the practices of the two benefits (self-benefit and benefiting others).