Based on Chapter 2, explain the role and necessity of a Guru in one's spiritual journey.

Chapter 2 of the Shri Sai Satcharitra firmly establishes the indispensable role of a Guru. It explicitly states the scriptural truth that "Without a Guru, there is no knowledge or spiritual goal." To illustrate this point, the text provides powerful examples, noting that even Rama, an incarnation of God, held the feet of his Guru Vasistha. Similarly, Krishna, the form of the Supreme Brahman, humbled himself by serving his Guru Sandipani by gathering wood. This emphasis on the necessity of a Guru is presented as a key realization for the author, who learns that arrogance and debating are obstacles to spiritual progress, which can only be overcome through the guidance and grace of a Guru.