Trace the development of Laxmichand's devotion to Sai Baba based on the events described in the text.

Laxmichand's journey of devotion, as detailed in Chapter 28, shows a powerful transformation. He initially arrived in Shirdi having taken a loan, a practice Baba discouraged. His devotion began to deepen when Baba miraculously fulfilled his unspoken desire for khaja. This was followed by a more profound experience where Baba verbally expressed Laxmichand's exact physical state of hunger and back pain, which the text calls an "echo without sound." The final and most convincing proof of Baba's omniscience came when Baba repeated Laxmichand's private thought about the 'evil eye' causing his cough. These successive events solidified his faith completely, turning him into a steadfast devotee who regularly sent offerings and surrendered himself at Baba's feet.