How did Sai Baba demonstrate his subtle and all-pervading nature through his daily habits, as mentioned in Chapter 10?

Chapter 10 illustrates Sai Baba's all-pervading and subtle nature through the description of his sleeping plank and his movements. It is noted that no one ever saw when he climbed up to or descended from the narrow plank suspended by rags, making his movements imperceptible. The chapter explains that this was possible due to the Great Siddhis (powers) residing within him. It further elaborates that the Master of 'Anima' (the power to become minute) could easily hide in a tiny particle, and that Baba’s movements were easy in the forms of flies, insects, or ants, showcasing his ability to be present anywhere in any form.