首楞嚴義疏注經 8.214

8.214

前以佛覺用為己心，即果辨因也；今以己心成佛所履，即因合果也。雖因果相合，未亡二相，故云若依。如在山頂足有所履。將顯法界無所分別，故云非依，如身處虛空也。下有微礙，喻若依也，存二相故。二相即是障入初地無明也，此約離障以顯。

Previously, taking the Buddha's awakening as one's own mind distinguished the cause in terms of the fruit; now, taking one's own mind to become what the Buddhas tread matches the cause to the fruit. Although cause and fruit match each other, the two characteristics have not yet been eliminated; hence it says "as if relying." It is like being on a mountain summit where the feet have something to tread upon. Being about to reveal the dharmadhātu as free of distinction, it says "not relying," like the body being situated in empty space. "Below there is still a slight obstruction" illustrates "as if relying," because the two characteristics remain. The two characteristics are precisely the avidyā that obstructs entry into the first ground; this is revealed in terms of leaving obstructions.