What does Chapter 18 reveal about a Guru's method of instruction and its effect on devotees?

According to Chapter 18, a Guru shows the true path to each person based on their individual worthiness, doing so without creating any intellectual conflict. The text states that when a devotee is fortunate enough to fall within the Guru's grace, the false logic of "mine" and "thine" finds no place, indicating the dissolution of ego. The Guru can effortlessly point out the Unperceivable One, a concept that even the Vedas debate endlessly. As the author of Chapter 18 notes, the Guru's guidance, when received with a calm mind, brings joy and a spring of love to both the speaker and the listener.