Thank you guys for this great explanations, but I was looking for a definition to what people that think that human evolved to a species that able to have an after life. My theory is, that we are living this life as a stage in our life cycle like a butterfly going from Caterpillar to fully butterfly. And I think we are in this stage to just charge our subtle bodies in order to survive in the after death. I also believe that sleeping is kind of gift of evolution to give us a glimpse or a training backyard to learn how to live the after life.