Is he able, but not willing? then is he malevolent.
Is willing to prevent evil, but not able? then is he impotent. He wrote, “Epicurus’s old questions are yet unanswered. The problem was perhaps most famously summed up by philosopher David Hume, an 18th-century neoskeptic. The world of philosophy terms this frustrating conundrum “the problem of evil.” Accordingly, the Dictionary of Philosophy (Penguin, 1999) tells us that “there is evil in the world: bad things happen to people, and people do bad things.” Furthermore, there is “a disproportion between virtue and happiness, between vice and misery: an evil exemplified when the wicked prosper and good people meet a grim fate.”
Without appropriate knowledge, the very fact of the existence of evil causes doubt about the existence of God. Over the many centuries of human endeavor, theologians and philosophers have puzzled over the origin of evil.