How is the Guru described in the teachings, and what is their fundamental role in a disciple's life?

The teachings describe the Guru in the most exalted terms, equating them with God manifest, specifically as Brahma, Vishnu, and Maheshwara. Chapter 18 states that the Guru is essentially the Supreme Lord, the Brahman beyond the beyond. The Guru serves as a mother, father, and ultimate protector, even when God might be angry. The Guru's role is multifaceted; they are the director of worldly activities, a guide to spiritual practices, and the teacher of righteousness and detachment. The Guru's word is described as a ray of light that provides a smooth guide through the narrow and difficult path of worldly life, which is often obscured by distraction and ignorance.