Professor: 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.
Albert Einstein: Excuse me, professor. Does cold exist?
Professor: What kind of question is that? Of course it exists. Have you never been cold?
Albert Einstein: In fact sir, cold does not esist. According to the laws of physics, what we condider cold, is in reality the absence of heat. Professor, does darkness exist?
Professor: Of course it does.
Albert Einstein: You are wrong sir, darkness does not exist either. Darkness is in reality the abscence of light. Light we can study, but not darkness. Evil does not exist, it is just like darkness and cold. God did not create evil. Evil is the result of what happens when man does not have God's love present in his heart.