According to the text, how does the concept of karma influence a person's life and their relationship with a Guru?

The text from Chapter 2 explains that every living being is governed by the system of Karma, and destiny is considered irresistible. This is illustrated through the story of a friend whose son died despite the presence of a Guru, which led the narrator to question the utility of a Guru. He pondered, "What can Gurus do against Karma?" and concluded that whatever is written on one's forehead will happen, making him initially hesitant to seek out a Guru like Sai Baba because he felt nothing could work against destiny.