What is the significance of the tortoise metaphor used in relation to Sai Baba's glance?

In Chapter 35, the author uses a powerful metaphor to describe the nourishing power of Sai Baba's glance. Devotees are compared to the young ones of a tortoise, who are said to be nourished simply by their mother's gaze without any physical contact. Similarly, Sai's glance alone is enough to sustain his followers, taking away their thirst, hunger, and exhaustion, leaving them feeling perpetually satisfied. This illustrates the profound and subtle way Sai provides for his devotees, where a single glance conveys a happiness so complete that it transcends the need for physical sustenance like food and water.