What's the full story behind Kakasaheb Dixit's vision of Vitthal and the picture he bought? Was it just a coincidence?

This event, described in Chapter 4, was a profound sequence of confirmation, not a coincidence. First, Kakasaheb Dixit had a vision of Vitthal during his morning meditation. When he later went for Sai Baba's darshan, Baba, being omniscient, immediately asked him, "Vitthal Patil had come, right?" This confirmed the reality of the vision. The proof was further solidified when, in the afternoon, a seller arrived with pictures of Vitthal. Kakasaheb was astonished to see that one of the images was an exact replica of the form he had seen in his vision. Realizing the divine orchestration, he lovingly bought the picture and installed it for worship.