大方廣佛華嚴經隨疏演義鈔 81.15

81.15

疏「第五示滅妙存」，滅既示滅，即無滅矣，故為妙存。「妙存」二字全是《無名》第四章名，彼論云「聖人處有不有、居無不無，居無不無故不無於無、處有不有故不有於有，故能不出有無、不在有無，怕爾無朕，斯為妙存。」然出沒常湛，兼明於出，今但無滅，故不同也。

On the commentary’s "Fifth, manifesting extinction yet marvelously preserved": since extinction is manifested extinction, there is no extinction, hence it is marvelously preserved. The two characters "marvelously preserved" are entirely the title of the fourth chapter of the Nameless. That treatise states: "The sage is in existence without existing, and dwells in non-existence without not-existing; dwelling in non-existence without not-existing, he does not lack non-existence; being in existence without existing, he does not have existence. Therefore, he can neither emerge from existence and non-existence nor abide in existence and non-existence; tranquil and without sign, this is marvelous preservation." However, "appearing and disappearing while ever serene" also explains appearing, whereas here it is only without extinction, so they are not the same.