God is in control, and suffering and pain are part of the plan. Suffering for Christians has a purpose of improving and strengthening their relationship with God (see James Ch 1 in the new testament), and He allows it to continue because there is meaning and benefit in it. And(I know this is what you didn't want me to say!) part of evil is to do with the fact that we turn away and rebel against
god (free will!) and though He gives us the chance to come back to Him He doesn't force us to. I'm sorry if it seems that everyone has a set answer - it's because we have to go on what it says in the bible - we can't just make up answers, and since all Christians have the same reference point, we tend to come out with the same answers!