What does the Shri Sai Satcharitra mean by 'Echo without sound' in the context of Laxmichand's story?

The phrase 'Echo without sound,' found in Chapter 28, refers to Sai Baba's profound ability to know and articulate the innermost, unspoken thoughts of his devotees. It's a poetic description of his inner knowledge (antardnyan). This is exemplified when Laxmichand was feeling restless due to hunger and back pain. Baba's words, 'Hunger has come, that's good. There should be medicine for back pain,' were a direct vocalization of Laxmichand's silent suffering. The text explicitly states, 'Whatever was in Laxmichand's mind, that was clearly expressed in Baba's words.' This phenomenon, an echo of a silent thought, revealed to the devotee that Maharaj was not just an ordinary person but one with divine, all-perceiving awareness.