The presence of evil, pain and suffering in our world is the most persistent argument raised against theism. The following are several of the main responses to the presence of evil in the world and its impact on the existence of the God of the Bible. The problem is, if you affirm two of these facts, you cannot affirm the third. Therefore, an all powerful, loving God does not exist. Second Formulation God is the author of everything.
Evil is something.
Therefore God is the author of evil. Third Formulation God made everything perfect. Imperfection cannot come from perfection. Therefore perfectly created beings cannot be the origin of evil. Therefore God must be the origin.