Evil exists inside of our universe and appears to be incompatible with an all-loving God. However, the existence of evil is evidence for the existence of God.
The biggest argument against the existence of God is the fact that evil exists in our universe. Many believe that if God is all-loving and all-powerful, evil would not exist. Since evil does exist, God cannot exist. What this fails to recognize is that there may be good reasons for God to allow evil to exist in this world.
First, we are able to have a better understanding of evil when we have an accurate view of eternity. This life is not all that there is. If God exists, we will live for an eternity and the evil of this world will shrink down to non-existence.
Second, we can also understand the existence of evil when we understand free agency. God created each person with the ability to freely choose love. In order for love to be a free choice, one also has the ability to hate. This is the cause of much evil.
Third, we have the problem of limited knowledge. There is no way to understand the purpose God has for allowing every evil act. Now I’m not using this as a cop-out. I’m not saying “we just can’t understand” every time God does something we don’t like. There are many responses to difficult questions that I have dealt with here. What I am saying is that in order to understand everything we would have to have knowledge of everything, and since we are limited beings we simply don’t. When we recognize this, then we can know that even though we don’t understand it, God may have a good reason for allowing the evil in our lives.
Naturalists will use this argument against Christians to show that God does not exist. What they fail to understand is that without a mind, free will, or an objective moral standard, there is no evil. Evil cannot exist if we are only physical beings. We would only be reacting to our chemicals and one would be unable to judge another for actions committed. So, rather than evil being used as an argument against the existence of God, we see that evil only exists because God exists.