Fairy tales do not tell children the dragons exist. Children already know that dragons exist. Fairy tales tell children the dragons can be killed. ~ G. K. Chesterton
I love the above quote. It is so true even for today's literature - at least good literature that could be classified as epic. Take for example, Harry Potter. Many people (especially Christians) have issues with Harry Potter because the evil in it is so great. (Aside: yes, of course the evil in it is great! Why? Because the evil in OUR story is so great. Watch Epic by John Eldredge to see what I'm talking about here). Anyways, things like Harry Potter aren't there to introduce evil to children/teens. They're there to show that evil can be defeated. It shows, as our story shows, that good triumphs over evil. The villain will always be put down. You see this in any other epic literature - for example, Lord of the Rings and Chronicles of Narnia. And of course many more. But I like that thought - not introducing evil to children (children already know that evil exists) but showing children that evil can (and will) be defeated. Sure the battle will be long, and hard, and horrible - but it will end with good triumphing over evil. Why? Because that's our story and that's how our story will end - good (Jesus) triumphing over evil (Satan) once and for all.