Based on the text, what does 'one-pointed devotion' mean and what are its rewards?

Chapter 25 explains that 'one-pointed devotion' is the primary thing Sai Baba desires from his followers. The concept is defined through a quote from Krishna to Uddhava: 'The Sadguru is indeed My own form.' Therefore, to worship a Sadguru like Sai Baba with focused love is the essence of one-pointed devotion. The rewards for such faith are significant and absolute. The text states that a 'devotee who is faithful and filled with devotion lacks nothing in attaining their desires.' It further promises that once 'one-pointed faith is established, Sai wards off all the misfortunes of that devotee' and 'grants the desired objects and removes their suffering.' The story of Damu Anna is presented as a direct testament to this principle, showing how his faith was rewarded.