According to the text, how did Sai Baba remain in a state of Samadhi while still engaging with the world around him?

As described in Chapter 4, Sai Baba possessed a remarkable ability to remain in a state of Samadhi, or deep meditation, without wavering, even while fully engaged with his surroundings. He would speak and walk with people, watch the dances of the Muralis, and even sway while listening to Gazals and songs. This was possible because his inner state was one of complete detachment; he felt no joy or sorrow for worldly matters, and his heart was described as being as clear as a mirror. He treated everyone equally, from kings to beggars, and was always situated in his own nature of Pure Existence, beyond dualities. This allowed his external actions to be separate from his unwavering internal peace.