What is the dynamic between an attentive listener and a speaker as described in Chapter 18, and what metaphor is used for the Guru's grace?

Chapter 18 describes a symbiotic and joyful relationship between a speaker and a listener. It states that when a listener is attentive, the speaker is filled with enthusiasm and respect, causing a spring of love to overflow in the heart, bringing joy to both. Following this, the chapter uses a beautiful natural metaphor for the Guru's grace. It compares the Guru to the "rain clouds of the monsoon," which shower the "water of self-bliss with love" upon everyone, implying an unconditional and universal outpouring of spiritual guidance and joy.