Based on these excerpts, how does Sai Baba demonstrate his 'inner knowledge' or omniscience?

The passages from Chapter 28 provide two clear examples of Sai Baba's 'inner knowledge,' which is described as an 'Echo without sound.' First, when Laxmichand is silently suffering from hunger and back pain, Baba openly speaks about the need to address hunger and find medicine for back pain, directly mirroring Laxmichand's private state. Second, after Laxmichand privately speculates that Baba's cough might be from an 'evil eye,' Baba himself brings up the topic in a similar way the next day. In both cases, Baba verbalizes the specific, unexpressed thoughts and feelings of his devotee, proving he has access to their inner world without any external communication.