妙法蓮華經玄義 2.6

2.6

佛法妙者，如經：「止止不須說，我法妙難思。」佛法不出權、實，「是法甚深妙，難見難可了。一切眾生類，無能知佛者」，即實智妙也。「及佛諸餘法，亦無能測者」，即佛權智妙也。如是二法，唯佛與佛乃能究盡諸法實相，是名佛法妙。

Regarding the profundity of the dharmas of buddhas: as the sūtra says, 'Stop, stop! There is no need to speak; my Dharma is wondrous and inconceivable.' The dharmas of buddhas do not go beyond the provisional and the real: 'This Dharma is extremely profound and wondrous, difficult to see and difficult to comprehend. Among all classes of sentient beings, none can know the Buddha'—this is the profundity of the real wisdom. 'And as for the Buddha's other various dharmas, likewise none can measure them'—this is the profundity of the Buddha's provisional wisdom. As for these two dharmas, only a buddha together with a buddha can exhaustively fathom the real mark of all dharmas; this is called the profundity of the dharmas of buddhas.