As I read Surprised by Joy, the most striking thing for me was how extremely unique all of our conversions are.  Notwithstanding the unique qualities of each conversion, there are common threads that run through each of them.

I think this is where joy comes in.  That longing that causes us to search out for the truth and that surprises us and 'stabs' us with intense feeling when we stumble upon it.  That initial contact with the divine startles us and causes us to think beyond what is right before our eyes.

From there life becomes a search for that joy - for the fullness we all long for.  When this pursuit if pursued earnestly and honestly, joy begins to fill our lives and will bring us to true conversion.

Regardless of what background one is born into, when one follows the Light of Christ they will be brought as close to Him as their circumstances will allow, and when they are allowed more, that desire will be fulfilled and they will be welcomed into His presence.