Chapter 16 mentions Sai Baba's 'sword of Knowledge'. What is this sword and what effect does it have?

The 'sword of Knowledge' mentioned in Chapter 16 is a powerful metaphor for the Sadguru's wisdom and teachings. It is described as a brilliantly shining sharp blade. Its purpose is to cut through the attachments and illusions of worldly existence. The text poetically states that upon seeing his hand raised to strike with this sword, the "tree of worldly existence (Bhav-vriksha) trembles in fear." This illustrates how the Guru's divine knowledge has the power to destroy the very roots of a devotee's entanglement in the material world, leading them towards liberation.