How did Sai Baba interact with or guide his devotees when he wasn't physically present with them?

Sai Baba's guidance transcended physical presence, often manifesting in supernatural ways. As detailed in Chapter 19, he frequently appeared to devotees in their dreams. For some, he would write the 'Guru-Brahma' mantra in their dream. For others with addictions, like a love for alcohol, he would go to them in their dreams, sit on their chest, and press their limbs until they promised to quit. Furthermore, his omniscience allowed him to know of secret actions, like someone practicing Hatha Yoga, and he would send corrective messages, sometimes through a complete stranger, demonstrating his ability to guide and intervene from anywhere.