How does Chapter 18 describe the Sadguru's method of instruction and the impact of his grace?

According to the insights in Chapter 18, the Sadguru's method of instruction is tailored to each individual's capacity. The text states that He shows the true path 'through instruction to each person according to their worthiness' and does so 'without creating even a bit of intellectual conflict.' The impact of the Guru's grace is profound; Chapter 18 explains that when one is fortunate enough to fall within the Guru's grace, the false logic of 'mine' and 'thine' (distinguishing between 'ours' and 'a stranger') completely vanishes, leading to a state beyond duality.