Chapter 10 mentions Baba's movements were 'imperceptible'. What does the text mean by this and what examples are given?

When Chapter 10 states that Baba's movements were imperceptible, it refers to his mysterious and subtle nature, which defied ordinary observation. The primary example given is his habit of sleeping on a narrow wooden plank suspended from the ceiling. The text makes it clear that no one ever witnessed him getting on or off this plank, stating, "when He climbed up or down, no one ever knew." To explain this, the chapter points to his divine powers (Siddhis), specifically mentioning 'Anima,' the ability to become minute. It suggests his movements could be as subtle as those of flies, insects, or ants, making them literally unnoticeable to human eyes.