大方廣佛華嚴經疏 6.21

6.21

五一毛等者，約偈不思議解脫力也。無礙有二義：一唯就所現，則毛中多剎自互無礙；二雙就能所，一毛不大而多剎不小，一多大小皆無礙也。又由無大小相故，此於取著障得解脫也。

In [the explanation of] the fifth, "in a single hair," and so on, it is explained according to the power of the inconceivable liberation in the verse. Unobstructedness has two meanings: first, simply with respect to what is manifested, the many lands within a hair are themselves mutually unobstructed; second, with respect to both subject and object, a single hair is not large and many lands are not small, so that oneness and multiplicity, largeness and smallness, are all unobstructed. Furthermore, because there are no marks of largeness or smallness, this attains liberation from the obstacle of grasping onto attachments.