What does Chapter 18 reveal about the Guru's method of instruction and the dynamic between a speaker and a listener?

In Chapter 18, the Guru is portrayed as a masterful guide who shows the true path to each person according to their individual worthiness, doing so without creating any intellectual conflict. The Guru can point out the Unperceivable One, which even the Vedas struggle to define, with effortless ease. The chapter also reflects on the reciprocal dynamic between a speaker and an attentive listener. It explains that when a listener is attentive, the speaker feels enthusiasm, a spring of love overflows, and both are filled with joy, emphasizing the importance of receptivity in spiritual discourse.