What was Dev's reaction when he finally understood that the Sanyasi was Baba in disguise?

Upon receiving Jog's letter detailing Baba's explanation, Dev was overcome with a mixture of love and deep regret. As described in chapter 40, his eyes filled with tears as he realized his error, and he exclaimed, "Shame, shame! I blamed Sai in vain!" He felt extremely dejected and ashamed of his own pride and lack of insight. Dev lamented how he could have been so blind as to not recognize his Master, acknowledging that a "veil of Maya" and his own preconceived notions had clouded his judgment, leading him to wrongly accuse Baba and miss the profound experience.