Can you describe the nature of true devotion and service as explained in Chapter 3?

Chapter 3 explains that true service and devotion involve turning one's internal tendency, or 'Vritti,' toward the divine 'Me,' which is the remembrance of pure, complete bliss. True worship is not merely ritualistic; it is performed with truth, faith, and devotion for one's own ultimate benefit. The highest form of service is to surrender exclusively and merge into the divine, much like a river loses its separate identity when it surrenders to the sea. This complete surrender of one's personal 'I-ness' at Sai's feet is described as the most complete service, through which a devotee becomes the very form of the Lord.