What kind of saint was Sai Baba, and what was his purpose according to the provided text?

According to Chapter 4, Sai Baba is referred to as a "Lord of Yoga" who appeared on the banks of the Godavari river. His purpose was the upliftment of the world, much like other great saints. The text describes him as having conquered the difficult-to-cross world, with peace as his primary ornament and being a literal storehouse of knowledge. Furthermore, he is characterized as the most generous of the generous, an incarnation of spiritual knowledge who has no love for perishable things because his mind is completely focused on the form of the Self.