The text says a Guru can 'strike a nail over the lines of destiny.' What does this mean according to Chapter 10?

The phrase 'strikes a nail over the lines of destiny,' as found in Chapter 10, is a powerful metaphor for the Sadguru's ability to completely change a devotee's fate. The text explains that by placing pure faith in the Guru's feet, one's predetermined destiny can be altered for the better. Chapter 10 emphasizes that this is a key benefit of devotion, alongside the complete destruction of worldly existence (Samsara) and crossing over the three types of miseries. This power underscores why the Guru is described as the 'one eternal God' for the devotee, capable of intervening in the laws of karma.