維摩經玄疏 1.62

1.62

二、約可說相，辨第一義悉檀相者，如《大智論》云：「一切實，一切不實，一切亦實亦不實，一切非實非不實，皆名諸法之實相。」佛於如是等處處諸經，說第一義悉檀相，此即是一家所明四門入第一義意也。故《中論》云：「若為向道之人，聞說四句即入，即是諸法實相；若人聞說四句，心生取著，皆是戲論。」

Second, discerning the characteristics of the paramārtha siddhānta in terms of expressible characteristics: as the Dazhidu lun states: 'All is real, all is unreal, all is both real and unreal, all is neither real nor unreal—these are all called the true mark of all dharmas.' In various sūtras in such places, the Buddha expounds the characteristics of the paramārtha siddhānta. This is precisely what our school explains as the meaning of entering the paramārtha through the four gates. Thus the Mūlamadhyamakakārikā states: 'If someone oriented toward the Path hears the four propositions expounded and immediately enters, that is the true mark of all dharmas; if someone hears the four propositions expounded and conceives graspings in their mind, they are all frivolous discourse.'