What is the relationship between faith and the effectiveness of Udi, as explained in the texts?

The texts illustrate that faith is a crucial component for unlocking the full power of Udi. Chapter 35 provides a clear example with the story of a man from Bandra plagued by bad dreams. When he sought a solution, a Sai devotee told him, 'If you too keep faith, the Udi will manifest its influence.' The man followed this advice, applying the Udi as instructed while keeping devotion in his heart and remembering Shri Sai. The result was immediate; his troubles were removed, and he slept soundly. This account demonstrates that Udi's natural tendency to remove trouble is activated and amplified by the devotee's sincere faith in Sai Baba.