What was the core principle behind Sai Baba's advice to Damu Anna regarding the cotton trade, and what happened next?

The core principle behind Sai Baba's advice was the virtue of contentment and detachment from the pursuit of extreme wealth. When Damu Anna sought permission for a cotton speculation deal to earn millions, Baba's counsel, delivered via a letter, was to reject this ambition. As detailed in chapter 25, Baba asked, "what do you lack at home?" and advised, "Half a loaf of bread is enough for us; do not fall into the trap of millions." Although this initially caused Damu Anna great despair, the letter also hinted that he should visit in person. Following this suggestion from Madhavrao, Damu Anna traveled to Shirdi, still hoping he might receive permission when he met Baba face-to-face.