首楞嚴義疏注經 10.59

10.59

"My mind is like a subtle dust mote": because the mind-nature is subtle, dense, and difficult to see, it is likened to a subtle dust mote, not that it is physically small. Here he grasps the subtle mind-nature, taking it to be the self. "Self" has the meaning of autonomy and masterhood; hence it can revolve while its nature undergoes no alteration, yet it can cause this coarse physical body of aggregates to have arising and ceasing. Because these coarse aggregates all flow forth from my mind, what flows forth is called impermanent, and that which is able to emit it is called the permanent nature.