仁王護國般若波羅蜜多經疏 2.411

2.411

解曰：言空者，妄倒空故。無相者，真如無相故。無作者，有為不實，無自作故。不順顛倒者，妄體本空，無所順故。不順幻化者，相無自性，體空寂故。從此第二明無相空。

The commentary states: 'Empty' means empty because erroneous inversions are empty. 'Signless' means signless because suchness is signless. 'Wishless' means [that which is] conditioned is untrue and has no self-making. 'Not according with inversions' means the substance of delusion is fundamentally empty and there is nothing to accord with. 'Not according with illusory transformations' means characteristics lack intrinsic nature and their substance is empty and quiescent. Hereafter is the second [section], explaining signless emptiness.