金剛經纂要刊定記 5.101

5.101

然以此為經勝由者。有兩重意：一謂教若麁淺聞乃尋常，既感悲啼乃知深妙。二謂常人啼泣未足為奇，善吉悲傷當知最勝。勝之所以，不亦明乎。

However, using this as the reason for the sūtra's superiority has two levels of meaning: First, if the teaching were crude and shallow, hearing it would be ordinary; since it induced weeping, one knows it to be profound and wondrous. Second, an ordinary person's weeping would not be sufficient to be extraordinary; when Subhūti grieves, one should know [the teaching] to be supreme. Is not the reason for its superiority clear?