What specific advice did Baba give Damu Anna in response to his plan to earn millions, and how did Damu Anna initially react?

In response to Damu Anna's ambitious plan, Sai Baba's advice was one of caution and contentment. According to Chapter 25, after hearing the letter, Baba dictated the reply: "Tell him in reply: what do you lack at home? Half a loaf of bread is enough for us; do not fall into the trap of millions." Damu Anna's initial reaction upon receiving this message was profound disappointment. The text describes that the "kingdom of the mind that he had built melted away on the spot" and that he was "very crestfallen," feeling that he had personally sabotaged a great opportunity by writing the letter.