注維摩詰經 2.294

2.294

生曰：空似有空相也。然空若有，空則成有矣，非所以空也，故言無相耳。既順於空，便應隨無相。

[Dao]sheng says: "Emptiness seems to have a characteristic of emptiness. Yet if emptiness had existence, emptiness would become existence and would not be that which is empty; hence he merely says 'signlessness'. Having complied with emptiness, one should then follow signlessness."