Who is described in the text as the 'incarnation of the Karna of spiritual knowledge'?

Chapter 4 bestows this significant title upon Sai Baba. The text describes him as the "incarnation of the Karna of spiritual knowledge," as well as the "most generous of the generous" and the "home of the Vaishnavas." This description emphasizes his immense spiritual wisdom and his unparalleled generosity in sharing that knowledge with others. The comparison to Karna, a figure from the Mahabharata known for his extreme generosity, highlights that Sai's gift was not material wealth but the invaluable treasure of spiritual insight and Self-realization.