There are several reasons. Jack might be feeling nostalgic and wants to relive those moments by talking about them. Another possibility is that he hopes to gain understanding from others. His childhood might have been filled with unique situations that he feels the need to explain. It could also be that he's simply in a storytelling mood and his childhood provides a rich source of material for an interesting tale.
Maybe he wants to share his past experiences with others.
He might tell his story to share his experiences with others.
Maybe he wants to share his experiences with others. He could have had some unique or interesting things happen to him that he thinks others can learn from.
Maybe he wants to share his unique experiences and lessons learned during his journey.
Maybe she wants to share her past and create a closer bond with Denver.
Perhaps Hamlet wants Horatio to be the one to spread the truth. Horatio is his trusted friend, and by having him tell the story, Hamlet ensures that the events will be accurately related, free from the misinterpretations that others might impose.
Maybe he wants to share his experiences and feelings with others.
Perhaps he wants to share his experiences as a form of catharsis. Telling his story could be a way for him to unload all the pent - up emotions and memories related to his homelessness. It could also be a way for him to make sense of his own life and situation.
He wants to pass on his wisdom. Through stories, he can share the lessons he has learned in life, like the importance of honesty or hard work.
Perhaps to strengthen their unity. If they understand his story, they can better work together as a group. His story might also inspire them in their own faith and evangelistic efforts.
Maybe he's afraid of being judged. People can be very critical, and he might not want to face the potential negative reactions.