Is God able to prevent evil in the world buh he is unwilling to do so ?then he is malevolent,IS he willing to prevent it buh is unable to do it ?then he is impotent ,is he both able and willing ?whence then ia evil.if GOd is perfectly good ,he must want to abolish all evil.if he is unlimitedly powerful,he must be able to abolish all evil buh evil exist;therefore either God is not perfectly good or he is not unlimitedly powerful.