Beyond the literal story of Das Ganu, what is the deeper spiritual teaching that Chapter 22 conveys through the act of focusing on Sai Baba's big toe?

Chapter 22 explains that focusing on Sai Baba's big toe is more than just a physical act; it is a profound spiritual practice. This act is presented as an 'easy means of devotion.' The chapter connects this practice to the 'logic of the branch and the moon,' using a single point of focus to perceive a greater reality. The ultimate teaching, as summarized in the text, is a call to humility and universal reverence. Baba says, 'Becoming egoless, bow your head to all beings. Do meditation on a single big toe; It is an easy means of devotion.' Therefore, as Chapter 22 illustrates, this simple meditation is a method for dissolving the ego and recognizing the divine.