According to Chapter 16, what is the role of the Sadguru and what is the proper way for a disciple to approach them?

Chapter 16 of Sai Satcharitra explains that the Sadguru is one whose desires are always fulfilled (Aptakama) and has taken a physical body solely for the purpose of helping others and uplifting the poor and lowly. The proper way for a disciple to approach the Guru is with complete surrender and firm faith. The text explicitly states that a disciple should simply surrender themselves to the Sadguru, as the Guru provides remedies for pitfalls the disciple may not even be aware of. Any use of "cleverness" or neglect in service is warned against, as it can lead the seeker into trouble.