首楞嚴義疏注經 2.239

2.239

入，達解也。若欲達解無方圓義，但去器之方圓，不可更除虛空方相。若欲達解無大小義，但去塵境大小，不可說言見性寬狹。

"Enter" (ru) means to reach an understanding. If you wish to reach an understanding of the principle of having neither squareness nor roundness, simply remove the squareness or roundness of the vessel, and do not further remove the square appearance of space. If you wish to reach an understanding of the principle of having neither largeness nor smallness, simply remove the largeness and smallness of the objective realms of dust, and do not say that the nature of seeing has breadth or narrowness.