大般涅槃經疏 1.42

1.42

三、「爾時大地」下，地動召中有陸動、水動，水地相依是故俱動，表無明、愛見二互相依，將翻有緣癡愛，故地動以表之。復言震者，起、涌、動是其形，震、吼、覺是其聲，廣則六動十八動也（云云）。然聲光動等，或前或後或復一時，感見不同豈可定執？

Third, in "At that time the great earth..." onward, within the summons by earth-quaking, there are land quakes and water quakes. Water and earth depend on each other, and therefore both quake, symbolizing that ignorance and craving/views mutually depend on each other; about to overturn the delusion and craving of conditioned existence, the earth quakes to symbolize this. Further, saying "trembled" (zhen): rising, surging, and moving are its visible forms; trembling, roaring, and waking are its sounds; in full, there are the six quakes and eighteen quakes (and so forth). However, sound, light, quaking, and so on are either earlier, later, or simultaneous; since the capacities and perceptions are not the same, how could one hold to a fixed view?