I liked to recite this story of Einstein.Once Einstein went to his class(I think he was 16 old) and this is what happened :
Teacher : "I'll prove to you if God exist then he is evil ! Did God create everything that exists ? If God created everything, then he created the evil! Which means God is evil!"
Einstein :" Excuse me, professor. Does cold exist?"
_ What kind of question is this? Of course it exists. Have you never been cold?
_ In fact sir, cold does not exist. According to the laws of physics, what we consider cold is in reality the absence of heat. Professor, does darkness exist?
_ Of course it does.
_ You are wrong sir, darkness does not exist either, darkness is in reality the absence of light. Light we can study but not darkness. Evil does not exist, it just like darkness and cold. God didn't create evil. Evil is the result of what happens when man doesn't have God's love present in this heart !!.