If God created everything, and if everything God created was Good, then what we call evil must merely be Good twisted and warped beyond recognition.
In that case, a seed of Good must still lie at the heart of every terrible act, thought & event, because evil is not stronger than God. It cannot destroy what God creates, but only mask it from us temporarily.
That means what we view as evil cannot be the final result, but only an intermediate step visible in this complicated universe. We can trust that in the end, every painful, sorrowful, heinous thing will be transformed: subsumed by the Good that lies hidden deeply within.
In the end of all ends, Good wins. And that is a hopeful thing.