金剛經纂要刊定記 7.71

7.71

以彼下。釋經中不可說也。五蘊和合無實體故，斯則界歸於塵則無界可取，塵歸唯識則無塵可取，四蘊離念則無心可取也。眾生取著皆由虛妄分別故。《起信》云：「一切境界唯依妄念而有差別。」此明經中但凡夫已下文。

Regarding "Because those..." and so forth: this explains the sūtra's "cannot be spoken of." Because the conjunction of the five aggregates lacks a real essence, thus when the world is reduced to subtle particles, there is no world to be grasped; when subtle particles are reduced to consciousness-only, there are no particles to be grasped; and when the four mental aggregates are separated from discursive thought, there is no mind to be grasped. Sentient beings grasp and cling entirely due to false discrimination. The Awakening of Faith says: "All realms exist in their differentiation solely depending on false thoughts." This clarifies the sūtra's text from "it is merely that ordinary beings..." onwards.