I'm sorry to hear about your fiance... I can't even imagine how you must feel right now. Seems like you are going through a normal grieving process, and are in the "anger" stage. I wish I could welcome you to the world of atheism at a happier time in your life
Like what I was saying in that philosophy thread... "the problem of evil" states:
- God, by definition is all powerful and all good. He must want to prevent evil and is capable of doing so.
- Bad, evil things happen all the time.
- God must not exist.
This works for me, but some theists have tried to reconcile this by stating that God gives us free will, or allows bad things to happen for the greater good.
I don't really like to promote religion, but if your fiance is religious, this may be a time in her life where she will need to rely heavily on it. How is she handling the diagnosis?