法華玄論 9.147

9.147

三者亦合亦開。明法身無生滅，迹身有生滅，豈非開二身耶？即生者不生、不生者生，多寶釋迦即是其事，豈非合耶？四者本迹是因緣義，不可一故不合，不可異故不開也。

Third, both uniting and opening: clarifying that the dharmakāya has no arising and ceasing, while the trace body has arising and ceasing—is this not opening two bodies? That which arises does not arise, and that which does not arise arises—Prabhūtaratna and Śākya are precisely this case—is this not uniting? Fourth, origin and trace have the meaning of causes and conditions: they cannot be one, so they do not unite; they cannot be different, so they do not open.