注維摩詰經 9.318

9.318

肇曰：欲言有耶，無相無名；欲言無耶，備應萬形。生曰：若有則有為，若無則無為。而佛既無此有，又不無有，何所是有為無為哉？

[Seng]zhao says: If you wish to call it existent, it has neither mark nor name; if you wish to call it non-existent, it responds fully to the ten thousand forms. [Dao]sheng says: If it were existent, it would be conditioned; if it were non-existent, it would be unconditioned. But since the Buddha is neither this existence nor not existence, how could there be conditioned or unconditioned?