What was Dev's reaction upon learning the truth about Baba's attendance at the feast?

After Jog sent a detailed letter explaining how Baba had attended the feast as the Sanyasi with two others, Dev was overcome with emotion. Chapter 40 describes how upon reading the letter, his eyes 'overflowed with a surge of love.' He immediately felt immense regret for his accusations, exclaiming, "Shame, shame! I blamed Sai in vain!" He became very dejected, blaming his own pride and clouded perception for his inability to recognize his Guru. This realization transformed his disappointment into a profound sense of awe at Baba's greatness and shame for his own lack of faith and insight.