Can you describe Kakasaheb Dixit's vision of Vitthal and how Sai Baba responded to it?

Certainly. As detailed in Chapter 4, after his morning bath, Kakasaheb Dixit was sitting in meditation when he received a vision of Vitthal. Later, when he went to see Sai Baba, Baba surprised him by asking, "Vitthal Patil had come, right? Did you meet him?" Baba then cryptically advised him, "That Vitthal is a big runaway! Nail him down and make him steady. He will escape if you avert your eyes, even for a moment of neglect." This exchange showed that Baba was fully aware of Dixit's inner spiritual experience.