Based on the opening verses of Chapter 6, what is the fundamental role of a Sadguru in a person's life?

The beginning of Chapter 6 establishes the Sadguru as the essential guide for both spiritual and worldly matters. It uses the metaphor of a helmsman, stating that only the boat (life) with the Sadguru at the helm will safely reach the far shore. The Sadguru's blessing hand purifies the devotee by washing away impurities of many births and grants stability when one's mind wanders. Ultimately, the Sadguru's role is to awaken the inner sense of 'I am He' (Soham) and dissolve the egoic sense of 'me and mine,' leading the devotee to experience innate bliss and the harmony of non-duality.