淨名玄論 6.18

6.18

有所得有無定住有無，故有不須表於非有，無定住無，故無不得表於非無。如此有無，既不顯非有非無不二正道，故名為失。因緣假名有無，則有不住有、有表不有，無不住無故無表不無。如此有無能表不二正道，故名為得。

The being and non-being of apprehension fixate on being and non-being; therefore, being does not express non-being, and non-being fixates on non-being, so non-being cannot express non-non-being. Since such being and non-being do not reveal the correct path of nonduality that is neither being nor non-being, it is called failure. As for the being and non-being of conventional designations through causes and conditions, being does not abide in being, and being expresses non-being; non-being does not abide in non-being, and therefore non-being expresses non-non-being. Since such being and non-being can express the correct path of nonduality, it is called success.