首楞嚴義疏注經 4.325

4.325

若汝執言：既非因緣即屬自然，狂亦自然，不狂亦自然者，初破狂自然，初一句牒，次一句定，未狂下二句破，如文。不狂下破不狂自然，初句牒，頭本下破。此顯一真之體尚無真妄之異，豈立因緣自然？斯則亦顯妄無因也。

If you cling to the assertion: since it is not causes and conditions, it belongs to spontaneity, madness is also spontaneous, and non-madness is also spontaneous; then first refuting that madness is spontaneous: the first line reiterates, the next line establishes, and the two lines from "before he was mad" downward refute, as in the text. From "if the non-madness" downward refutes that non-madness is spontaneous: the first line reiterates, and from "the head fundamentally" downward refutes it. This reveals that in the essence of the one reality there is not even a difference between real and false; how could causes and conditions or spontaneity be established? This then also reveals that delusion has no cause.