大方廣佛華嚴經隨疏演義鈔 63.127

63.127

第二位果中，疏「證智契如事為真金」者，論云「此地智光明，真如事示現。如經諸佛子，譬如真金等。」釋曰：證智為真金。如為所契之理，智為能契之事，事合於如故云如事。教智能顯上之如事，故如硨磲。

In the second, the fruit of the stage, regarding the commentary's phrase, "the realization knowledge tallying with suchness as a concrete event is pure gold": the treatise says: "The light of knowledge of this stage / Manifests suchness as a concrete event. / As the sūtra says, 'O sons of the Buddha, / It is, for example, like pure gold,' etc." Commentary: Realization knowledge is pure gold. Suchness is the principle that is tallied with; knowledge is the concrete event that tallies. Because the concrete event harmonizes with suchness, it is called "suchness as a concrete event." Pedagogical knowledge can manifest the aforementioned suchness as a concrete event, and hence is like mother-of-pearl.