It is a fact that we are all born into this life to eventually die, the date and time uncertain. That is the way it has always been and always will be. Christianity became popular because it promised that after death there was a chance to experience eternal life with the Heavenly Father. Cultures all throughout human history believed in an afterlife from the Egyptians to the Mayans of Mexico. I believe we all have a purpose for our being alive, and when we find that purpose all is well.
On the subject of being re-born my thoughts on that subject is that everyone that has ever lived in the past is alive right now in a different body. We all wonder what happens to the soul when it leaves the body. My opinion is that it takes ups residence in body of the fetus. Some us are familiar with the term Deja Vu where for a split-second you feel like you have been there before in the past, and there are the child prodigy’s we have seen in all generations throughout history. How can one explain some very young with the knowledge that only come with age and experience.? I would say their DNA that is passed from the past to the future.
Most religions teach those who believe to behave in a certain way during their lives and at the end there will be some kind of reward at the end. I believe we all are living eternal lives everyday because our bodies are just temporary to begin with. Think about it.