In dreams you create entire worlds, environments, situations, and even other people. You interact and converse, create conflict and resolutions, get emotional and involved, but suddenly when you wake up from the dream you realize that all those environments, situations, and other people were really all you! They only seemed like separate individuals because of the level of consciousness you were operating on at the time. It is the same in this world, where you think you are a separate person, but in fact when you die, a piece of God wakes up to realize He was only dreaming.