How did Sai Baba describe his personal feelings and state of mind while serving his Guru?

In Chapter 19, Sai Baba recounts his profound devotion to his Guru, whom he served for twelve years. He describes an all-consuming love and focus, stating, "I would gaze at my Guru's face with love day and night; I felt neither hunger nor thirst; without the Guru, my mind was restless." His Guru was his only goal and his constant contemplation. Baba explains this intense focus was exactly what his Guru expected, desiring nothing more. He fondly recalls his Guru as a "veritable idol of devotion and love" whose heart was full of immense affection for his disciple.