Based on Chapter 6 of the Sai Satcharitra, what is the role and significance of a Sadguru like Sai Baba?

According to Chapter 6 of the Sai Satcharitra, the Sadguru is the essential helmsman for both spiritual and worldly matters, ensuring that the devotee's boat reaches the far shore. The mere utterance of 'Sadguru' brings Sai to mind, who then places His blessing hand upon the devotee's head. This touch is wondrous, as it can burn away the subtle body or ego into ashes and wash away the accumulated impurities of many births. By surrendering with body, speech, and mind to a capable Sadguru like Sai, the four primary goals of life—Dharma, Artha, Kama, and Moksha—can be attained naturally.