What does Chapter 16 say about Sai Baba's purpose for taking a physical form and the power he wields?

Chapter 16 of the Sai Satcharitra describes Sai Baba as the 'King of Yogis' who is Stainless, Imperishable, and beyond attributes. It clearly states that he has taken a physical body for a benevolent purpose: 'for the sake of helping others, to uplift the poor and lowly.' The chapter also alludes to his immense power, describing the 'sharp blade of the sword of Knowledge' in his hand. The mere sight of his hand raised to strike is said to make the 'tree of worldly existence' tremble in fear, symbolizing his power to destroy worldly attachments and illusions for his devotees.