It was of course Aquinas who most notedly postulated the problem of evil — either God couldn't stop evil happening so he wasn't all-powerful; or he he could but let it continue for his own arcane purposes, so he wasn't all -loving. He was lucky they made him a St rather than burning him, wasn't he? The sort of thing that could have gone either way back then in C13. He would almost certainly have been burned going on like that a couple of centuries later, when the Inquisition had really got going...