What does Chapter 10 reveal about the imperceptible nature of Sai Baba's movements?

Chapter 10 emphasizes that Sai Baba's movements were often imperceptible to those around him. Specifically, it discusses his habit of sleeping on a narrow plank suspended from the ceiling. The text states that no one ever knew when he climbed up onto the plank or when he descended from it. This mysterious ability is linked to his divine powers (Siddhis). The chapter suggests this was possible due to 'Anima,' the power to become minute, and that Baba's movements could be as subtle and easy as those of flies, insects, or ants, making them completely unnoticed.