It isn't difficult to think about a time in out life when we were taught a story about good versus evil. For me I was taught about the enemy satan as being the opposite of God. Pretty much taught as an almost equally matched foe that is engaged in an epic battle.
One thing we never really think about is how. How is this happening, and how did satan get the ability to do the things he is doing. If we believe that God created everything, then we must take a minute to think about the fact that God had to create evil. He had to create satans abilities and very aspect of the balance of good and evil.
When I think about the harder questions it just brings me to a greater place of awe in my belief in God. I Am Found.