What is the true purpose of saints like Sai Baba, and how do they help their devotees achieve realization?

As detailed in Chapter 4, the incarnation of saints like Sai Baba is purely for the sake of others, to lift the distressed, as they have no self-interest. They are compared to a philosopher's stone, but their action is considered even more extraordinary. While a philosopher's stone turns iron into gold, these saints give their own form, which is Self-realization, to their devotees. They help individuals discard the feeling of duality and realize the ultimate truth that everything is Brahman, thus completing their mission of spiritual upliftment.