How does Chapter 10 explain the transformative power of having faith in a Sadguru?

Chapter 10 profoundly illustrates the effects of faith in a Sadguru. It states that by placing faith in the Guru's feet, he can 'strike a nail over the lines of destiny,' signifying his ability to change a devotee's fate. The chapter explains that pure service to the Sadguru destroys the worldly existence (Samsara) and helps one cross the ocean of existence, just as a boatman helps one cross a physical ocean. For those with devotion, the Guru places Knowledge in their hands and grants liberation, effortlessly destroying accumulated and current karmas.