What is the meaning of the 'logic of the branch and the moon' as mentioned in Chapter 22 in relation to Sai Baba's feet?

The 'logic of the branch and the moon,' mentioned in Chapter 22, is a classical Indian metaphor used to explain how a tangible, nearby object can be used to point out a distant, abstract one. Just as someone points to a tree branch to guide another's gaze towards the moon in the sky, Sai Baba's feet served as a tangible focal point for devotees to grasp the formless divine. The chapter explains that devotees' longing for a divine vision was fulfilled by focusing on Baba's feet. Specifically, it notes how the nail on Baba's right big toe shone "like the second day's moon." By directing their attention to this physical point, as described in Chapter 22, devotees could satisfy their "curiosity for a vision," using the form to perceive the formless.