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

The phrase 'strikes a nail over the lines of destiny,' found in Chapter 10, means that a true Sadguru has the power to change a devotee's fate for the better. Beyond altering destiny, this chapter explains that the Guru's power is immense. By seeing a devotee's faith, He can place Knowledge (Samvitti) in their hands and grant liberation (Moksha) effortlessly. The Guru's sight alone can break the knots of the heart, eliminate attachment to sense objects, and destroy both accumulated (Sanchit) and current (Kriyaman) karmas, effectively clearing the path for spiritual progress.