What is the step-by-step process of spiritual progress through devotion as outlined in Chapter 46?

According to Chapter 46, the path to spiritual progress begins with surrendering one's body, speech, and mind at Sai's feet and engaging in constant chanting of his name. This practice is described as a powerful remedy that first washes away sins. The chapter details that this leads to the diminishing of the qualities of 'Rajas' (passion/activity) and 'Tamas' (ignorance/inertia), while the quality of 'Sattva' (purity/goodness) gradually increases. This purification process awakens a righteous disposition ('Dharma'), which in turn brings about detachment from worldly subjects and leads to the instant manifestation of self-knowledge, culminating in a state of peace and complete devotion.