法華玄論 2.15

2.15

第三辨三德。初段經明權實二智，即是般若；後段辨本迹，名為法身；此二無累，稱為解脫。是故斯經三德斯備，故名為常。

Third, explaining the three virtues. The first section of the sūtra clarifies the two kinds of wisdom, provisional and real, which is prajñā; the latter section explains the origin and the trace, which is dharmakāya; these two are free from encumbrance, which is called liberation. Therefore, this sūtra is fully endowed with these three virtues, and is thus called permanent.