大方廣圓覺修多羅了義經略疏 2.711

2.711

法性者，諸法之性，若直譚本體，則名覺性。若推窮差別之法，皆無自體，同於一性，即名法性。今推破四相，豁融諸法，全同覺性，故云開悟法性。從前經文但云覺性，唯此段云法性，意在此矣。

"The nature of phenomena" is the nature of all dharmas. If one directly discusses the original essence, it is named the nature of enlightenment. If one examines the differentiated dharmas to their end, none has an intrinsic essence and all are identical to the one nature; then it is named the nature of phenomena. Now, investigating and breaking down the four marks opens and merges all dharmas to become entirely identical with the nature of enlightenment; hence it says 'open and enlighten us to the nature of phenomena.' While previous sūtra passages only spoke of 'the nature of enlightenment,' only this passage speaks of 'the nature of phenomena'; the intention lies here.