How did Sai Baba teach the lesson of looking beyond religious and caste distinctions to his devotees?

Sai Baba often demonstrated that the divine transcends religious and caste boundaries through his inconceivable Lilas, as illustrated in Chapter 12. One powerful example is the story of a doctor, a devout Brahmin and worshipper of Lord Ram, who was hesitant to visit a 'Muslim' saint. He firmly resolved not to bow to Baba. However, upon entering the Masjid, he didn't see Baba but his own worshipful deity, the 'dark-complexioned form of Ram.' He immediately prostrated. When questioned, he explained what he saw, realizing that Baba was a 'yogically-perfect incarnation.' Similarly, as Chapter 12 recounts, Mule Shastri, a high-caste Brahmin, lost his pride and notions of untouchability when he saw his own Guru in Baba, making devotees realize that Baba's form was a vessel for the divine principle they worshipped.