What do dreams about good and evil represent?

I'm in the ocean and there is a blue light emanating from the water which symbolizes heaven, a safe place, and as I am swimming towards it, from beneath the waters comes this red force in a ship and starts to pull me under. The persons on the ship are the devil and his minions. I try to get away but I cannot and they have me under for a while. The dream then jumps to where I am on a mountainside and running away from him and his minions. As I'm running, I don't really appear to be making any progress and I just keep going around in circles. I pass a baby in a car seat and wonder why a baby would even be in a place like this. As I pass the baby again, I see that one of the devil's minions is eating the baby...that is all I remember and then I wake up. What does this mean?