首楞嚴義疏注經 4.322

4.322

初二句牒，次二句破。若自然頭由因緣故得成狂走，亦應自然不失由因緣故而失其頭。本頭下四句結也。今既本頭無失，狂自妄出，狂之與頭了不相觸，何曾變改而假因緣？

The first two lines reiterate, and the next two lines refute. If the spontaneous head came to run about madly due to causes and conditions, then the spontaneous non-losing should also have lost its head due to causes and conditions. The four lines from "the original head" downward conclude. Now, since the original head was not lost, and the madness arose falsely of itself, the madness and the head were completely non-interfering; how had it ever changed, so as to rely on causes and conditions?