金剛經纂要刊定記 2.66

2.66

疏明經宗體者。宗即所詮、體即能詮。今初宗者，尊也，重也，心言之所尚也。然言由於心故。故肇公云：「情尚於空者，觸言而賓無。」《毛詩序》云：「情動於中而形於言。」餘皆例此。文二。初、統明諸教

As for the commentary's "clarifying the sūtra's central doctrine and substance": The central doctrine is the signified; the substance is the signifier. Now, first, "central doctrine" (zong) means veneration, importance—that which is prized by mind and speech. Now, speech originates from the mind. Thus Master Zhao says: "When the sentiments prize emptiness, at every word they submit to non-existence." The "Preface to the Mao Odes" says: "Emotions are stirred within and take form in speech." The rest are all analogous to this. The text has two parts. First, an overview of the various teachings.