How did Sai Baba demonstrate his connection to Lord Vitthal and emphasize the power of a devotee's faith?

Sai Baba showed a profound connection to Lord Vitthal by teaching that sincere faith could manifest divine visions right in Shirdi, making long journeys unnecessary. As detailed in Chapter 4, when Das Ganu organized a Name-week, Baba assured him that 'the form of Vitthal will appear! But the devotee must be full of faith.' This was proven true when Kakasaheb Dixit had a vision of Vitthal during his morning meditation. Baba later confirmed this by asking him, 'Vitthal Patil had come, right?' The experience was further validated when a picture matching the exact form from the vision appeared for sale that very afternoon.