How does Sai Baba's nature transcend the physical limitations of birth and death?

As detailed in Chapter 43, Sai Baba is considered the complete Supreme Brahman, for whom birth and death do not apply in the conventional sense. He is described as a mass of bliss who incarnated by his own will for the sole desire of his devotees' welfare. The text explains that his body was merely an adjunct, and he could die at will, burning the body in the fire of Yoga. He then merged himself into his previous unmanifest state, transcending the material form, while remaining firmly imprinted in the hearts of his devotees.