A Personal labyrinth to me is a representation of struggles you are or have experienced in your life. My personal labyrinth some of the struggles I've experienced are, pressure from family, and school. Also moving around and changing schools a lot. As I was a kid I moved a lot, it made it hard to have close friends, and relationships with people. I have learn to not think about what's going to happen in the future, and focus on the present.
I think that the great perhaps is a turning point in your life. You can have many through out your life but not one is more important then the last. Mile's "great perhaps" was going to boarding school far away from home. He changed his routine life into something completely different from his norm. Everyone has at least one "great perhaps in their life time. The key is to not linger in the past, and just keep moving forward, and live in the present.