What does it mean that Sai Baba could 'die at will' and how did he remain present for devotees after his Mahasamadhi?

The ability to 'die at will' signifies a Yogi's complete mastery over the life force and the body, viewing death not as an involuntary event but as a conscious choice. Chapter 43 explains that Sai Samarth 'burned the body in the fire of Yoga' and 'merged himself into the unmanifest.' This was not a perishing of his being but a transition. He remains present because, as the text asserts, he 'stayed in the hearts of the devotees' and continues to keep them spiritually 'awake.' His true form is described as filling the entire 'moving and non-moving world.' The scripture argues that a being so 'firmly imprinted in the hearts of devotees' cannot be said to have perished, and even today, devotees experience his presence based on the feeling in their own minds.