How do you find hope when you've been disappointed too many times?

Hope is easy when things are new — it's what you do with it after it's been wrong enough times that starts to feel impossible.

At some point protecting yourself from more disappointment starts to look a lot like giving up, and it becomes very hard to tell the difference.

Have you ever had to rebuild hope from scratch after it was taken from you — what made you try again, and is there something you're still afraid to hope for?