仁王護國般若波羅蜜多經疏 2.39

2.39

Question: What is the difference between the earlier emptiness of emptiness and this emptiness of emptiness? Answer: The earlier one refuted all phenomena, hence it was called the emptiness of emptiness; this one refutes the preceding emptiness, hence it is named the emptiness of emptiness. If so, because phenomena exist they are refuted, and thus called empty. Since emptiness is not a phenomenon, what does emptiness refute? Answer: Having refuted all phenomena, there is only emptiness; emptiness must also be abandoned, hence the emptiness of emptiness is necessary. Just as medicine cures an illness and when the illness is gone the medicine is discarded: if the medicine is not discarded, the medicine in turn becomes an illness. Fearing that emptiness may become an illness, one discards emptiness with emptiness; therefore it says "the emptiness of emptiness." Next is the second [section], the provisional existence of phenomena. This is divided into two: first, clarifying that phenomena exist; later, clarifying the emptiness of self and phenomena. The first part, that phenomena exist, is divided into three: first, positing that phenomena exist.