Based on Chapter 29, what does the story of the student and his examination illustrate about self-doubt and Sai's grace?

Chapter 29 recounts the story of a student who, due to self-doubt, incorrectly believed he had failed his written examination and became dejected. This self-distrust almost caused him to miss his oral exam. The narrative shows how the student's suffering was self-inflicted, born from a lack of courage and faith in his own efforts. Sai's grace is illustrated when an examiner intervenes, delivering the "joyful news" that he had passed. This intervention turns the situation around completely, filling the student with enthusiasm and leading him to rush to Maharaj Sai. The story demonstrates that self-doubt is a significant obstacle, and Sai's grace can resolve such situations, ultimately fulfilling a devotee's wish and strengthening their devotion to the Guru's feet.