According to Chapter 16, what is the nature of a Sadguru's relationship with his disciples, especially concerning service and offerings?

Chapter 16 explains that a Sadguru is 'Aptakama,' meaning his desires are already fulfilled, so he needs nothing from a disciple. The Sadguru's true purpose is to fulfill the disciple's desire for service, thereby making the disciple desireless. The chapter emphasizes the importance of inner attitude over material value, stating that Baba accepts a simple leaf or flower offered with faith and love but turns away from any offering made with pride. He is an ocean of Truth, Consciousness, and Bliss, so while he has little regard for outward rituals, he enjoys them with satisfaction when they are performed with sincere faith.