Chapter 10 mentions the Guru can 'strike a nail over the lines of destiny.' What does this mean for a devotee?

According to Chapter 10, the Guru holds immense power to alter a devotee's life path. The phrase 'strikes a nail over the lines of destiny' signifies that by placing complete faith in the Sadguru's feet, one's fate can be changed. This chapter emphasizes that the Guru is the one eternal God, distinct from other illusory deities. Through the Guru's grace, devotees can overcome the three types of miseries—physical, mental, and divine. The Guru acts as a boatman, safely guiding followers across the challenging ocean of worldly existence (Bhavasagar) simply through their devotion and faith.