The text mentions that Baba's movements were 'imperceptible'. What does Chapter 10 mean by this and what examples does it provide?

Chapter 10 highlights the mysterious and subtle nature of Sai Baba by describing his movements as imperceptible. The primary example given is his habit of sleeping on a narrow wooden plank suspended by rags. The text emphasizes that no one ever knew when he got up onto the plank or when he came down. This is used to illustrate a quality that went beyond normal human capabilities. The chapter suggests this was possible due to his great Siddhis (powers), specifically referencing 'Anima,' the power to become as minute as a particle. This power would allow him to move with the ease and subtlety of flies, insects, or ants, making his comings and goings completely unnoticed.