Sometimes (at least in principle) God might allow some evil because doing so will prevent a greater evil, and sometimes He might allow evil because it will produce a greater good.
Greg KouklSome people suggest that a worldview is like a set of glasses that color the way you see the world around you. A Christian interprets the world one way, and an atheist interprets the same world a completely different way since he's looking through different worldview "glasses."
Greg KouklThough it's hard to be completely certain about things like this, I have a suspicion that only someone with deep freedom (one who makes decisions for reasons that are his own) and who's also a moral being (can experience goodness) can have a meaningful friendship with God. If friendship with God and sharing in His happiness are good things (and it seems they are), then making a creature who could enjoy these things is also a good thing, even if it comes with a liability. There's a risk.
Greg Koukl