What was the author's personal motivation and experience in writing the Sai Satcharita, as revealed in Chapter 49?

In Chapter 49, the author reveals a deeply personal and divinely inspired motivation for writing the Satcharita. Initially, he felt that silence was the best form of praise for the unfathomable Sai. However, the sheer bliss of Sai's leelas (divine play) made it impossible for him to remain still. He compares the stories to a "sweet delicacy" that must be shared with friends and fellow devotees, as joy shared is doubled. The author also admits a personal motive, stating he started the Satcharita for his "own self-interest." Most importantly, he clarifies that he is merely an instrument, stating that the merciful Sainath entered his mind and "got His own book written," fulfilling the author's desires in the process.