After learning the truth, who did B.V. Dev blame for his inability to recognize Sai Baba?

After learning the truth from Jog's letter, B.V. Dev blamed himself for his failure to recognize Sai Baba. He was overcome with emotion and felt great shame and regret for doubting the saint. As detailed in Chapter 40, he exclaimed, "Shame, shame! I blamed Sai in vain!" and lamented his own "pride of knowledge." He acknowledged that a delusion had fallen upon him, which confused his vision and prevented him from seeing that the Sanyasi was indeed Baba.