妙法蓮華經玄義 6.37

6.37

此應作四句：自、他、共、無因，破是性義悉不可。無此四句故，則無性。無性故，但以世間名字，四悉檀中而論感應能所等。而能應屬佛，所應屬眾生；能感屬眾生，所感屬佛。若更翻疊作諸語言，世諦名字則亂，不可分別。雖作如此名字，是字不住，是字無所有故，如夢如幻（云云）。

Here one should formulate four positions: self, other, both, and without cause. Refuting these essential natures, none of them are tenable. Because these four positions do not exist, there is no essential nature. Because there is no essential nature, it is only in worldly names, within the four siddhāntas, that active and passive stimulus and response are discussed. The active responder belongs to the Buddha, and the passive object of response belongs to sentient beings; the active stimulator belongs to sentient beings, and the passive object of stimulus belongs to the Buddha. If one were to turn this over and produce various alternative formulations, conventional names would become confused and indistinguishable. Although such names are formulated, these words do not abide; because these words have no real existence, they are like dreams and illusions (and so on).