THE PROBLEM OF EVIL & SUFFERING
God can do all things that are possible - Thomas Aquinas
nonsense remains nonsense even when we talk it about God - C.S. Lewis
Most of the debates in the topic are about whether preventing or undoing evil really is a logical impossibility. If it is logically possible for God to create a world in which innocent people do not suffer, then the fact that our world isn't like that suggests that God is not truly omnipotent or not truly good - or both.
I do not think that we should ever say of anything that it cannot be brought about by God - Rene Descartes
Descartes argues that God created the laws of logic and he isn't bound by them - he could break them if he wanted, such as by creating a square circle. For Descartes, believing that some things are impossible for God is to dishonour God's greatness.
However, Peter Geach arguers against Descartes' view:
as we cannot say how a non-logical world would look, we cannot say how a supra-logical God would act or how he could communicate anything to us by way of revelation - Peter Geach