How did Sai Baba know about Laxmichand's specific craving for khaja and his back pain?

Sai Baba demonstrated his inconceivable inner knowledge, or 'antarjnan', by perceiving Laxmichand's unspoken thoughts and physical discomfort. As detailed in Chapter 28, Laxmichand was suffering from both hunger and back pain while simultaneously craving khaja, a sweet he had eaten two days prior. At that very moment, Baba's words echoed Laxmichand's condition, as he said, "Hunger has come, that's good. There should be medicine for back pain. Now the wind of khaja has blown." This event, described as an "Echo without sound," showed the devotees that Baba was fully aware of Laxmichand's internal state without being told.