Based on the provided text, what was the source of Dev's delusion that prevented him from recognizing Sai Baba?

Dev's failure to recognize Sai Baba stemmed from a specific sequence of events that created a "veil of Maya." According to Chapter 40, Dev's "vision was confused" because the Sanyasi first appeared to ask for funds for cow protection, which happened before Dev had even formally invited Baba to the Udyapan. This initial encounter, focused on fundraising, fixed in Dev's mind that the man was just a collector. He later lamented that he "forgot to pay attention" to Baba's specific words about coming with two others. Dev concluded that this "delusion fell" upon him because the Sanyasi's first visit had a different purpose, making it difficult for him to infer that this same person was Baba fulfilling his promise.