How does Sai Baba use challenges and difficulties to strengthen a devotee's faith?

Chapter 29 explains that Sai Baba has a consistent practice of reinforcing faith through trials. This process is compared to a peg of an oil-press, which is first shaken and then fixed firmly. While the spiritual path may seem sweet initially, obstacles, described as 'thorns upon thorns,' are intentionally introduced by Sai. The purpose of these obstacles is to compel the devotee to remember Sai continuously. By facing difficulties head-on while maintaining remembrance, calamities are overcome, and this very process is what instills firm and unwavering faith.