How did Sai Baba describe his relationship with his own Guru and the nature of his training?

Sai Baba described his relationship with his Guru as one of intense love and devoted service that lasted for twelve years. In Chapter 19, he recounts that despite his tireless service, his Guru never gave him a formal 'ear-mantra' or secret instruction. Instead, the Guru's teaching was conveyed through immense love and a protective, merciful glance. Baba felt neither hunger nor thirst while gazing upon his Guru's face, which was his sole contemplation. He compares his Guru's care to that of a mother tortoise who nurtures her young from across a riverbank with her sight alone, emphasizing that this loving gaze was the source of his contentment and protection.