Given the following passage  "According to this narrative, shortly after the birth of young prince Gautama, an astrologer named Asita visited the young prince's father, Suddhodana, and prophesied that Siddhartha would either become a great king or renounce the material world to become a holy man, depending on whether he saw what life was like outside the palace walls.",  answer the following question. Note that the answer is present within the text.  Question: What would have to happen for Siddhartha's fate to change?
The answer to this question is:
whether he saw what life was like outside the palace walls