How can a saint like Sai Baba be considered beyond the cycle of birth and death?

Chapter 43 explains that saints are free from the six-fold changes and emotions, existing in an unmanifest state. They become manifest in a physical form, taking on avatars, for the salvation and welfare of their devotees. Sai Samarth is described as the complete Supreme Brahman, a mass of bliss who does not know the birth of the body, so how can there be death? For such beings, birth and death are considered false imaginations. They have already conquered death, placing their feet on the head of Time, and incarnate by their own will, untouched by the normal cycles that bind others.