註華嚴經題法界觀門頌 2.241

2.241

十方所有佛，盡入一毛孔。義曰：多法望一名攝入者，謂無多可遍、無多可容，故曰攝入矣。正攝即入、正入即攝，故曰無礙也。多法者，是前所遍所容一切事法也，到此却為能攝能入矣。一法者，是前能遍能容一事也，到此却為所攝所入也。言有前後，法在同時耳。

"All the Buddhas of the ten directions / Completely enter into a single pore."
The meaning is: The many phenomena facing the one is called inclusion and entry, meaning that there are no "many" that can pervade and no "many" that can accommodate, hence it is called inclusion and entry. At the very moment of inclusion, there is entry; at the very moment of entry, there is inclusion—hence it is called unobstructed. The "many phenomena" are all the phenomenal dharmas that were previously pervaded and accommodated; arriving here, they become, on the contrary, that which can include and can enter. The "one phenomenon" is the one phenomenon that previously was able to pervade and able to accommodate; arriving here, it becomes, on the contrary, that which is included and entered. The words have before and after, but the phenomena are simultaneous.