Can you elaborate on the analogy of the mother tortoise that Baba uses to describe his Guru's grace?

In Chapter 19, Sai Baba uses a powerful analogy to illustrate the subtle and profound nature of his Guru's grace. He compares his Guru to a mother tortoise on one river bank who nurtures her young on the opposite bank simply through her loving sight. Baba explains, "Just as a mother tortoise feeds her young with her sight alone, such was the way of my Guru; he protected his child with his gaze." This metaphor highlights that the Guru's protection and spiritual sustenance were conveyed not through physical proximity or explicit instruction, but through a constant, merciful glance filled with love, rendering formal efforts like mantras unnecessary.