How does the story of the man from Bandra demonstrate the practical application and power of Sai's Udi?

The experience of the gentleman from Bandra, detailed in Chapter 35, serves as a powerful testament to the practical application and influence of Sai's Udi. He was suffering from a psychological and spiritual affliction—disturbing nightmares of his deceased father—that no remedy could solve. A Sai devotee prescribed a simple, faith-based solution: apply Udi to the forehead, keep it under the pillow, and remember Sai. The result was immediate and complete; the nightmares ceased, and he slept peacefully. This narrative shows that the Udi is not just a symbol but a potent tool that, when used with faith, can remove deep-seated troubles and bring tangible relief and happiness.