Can you elaborate on the 'logic of the branch and the moon' as it's applied to Baba's posture and the vision of his toenail in Chapter 22?

In Chapter 22, the 'logic of the branch and the moon' is used to describe how a devotee can perceive the divine through a focused point. Just as one might use the gap in tree branches to locate the faint crescent moon, the text describes a method for achieving a divine vision from Baba himself. It details how Baba would sit with his right foot over his left knee and grasp his toes with his left hand. The wise would then instruct devotees to gaze through the gap formed by his fingers, as mentioned in Chapter 22. By doing so, the nail of his right big toe would appear like the shining crescent moon, fulfilling the devotee's longing for a celestial vision.