There are two basic thoughts regarding Human existence; first thought being of temporal existence, existence ends with death and second thought of eternal existence, existence continues even after death.
Temporal existence is a theory proposed by materialists, existentialists, scientists and atheists. Since science has proved that energy can not be created or destroyed, few scientists believe that the energy that lives inside the Human body continues to exist after death. The majority of the scientists though believe that Human life is temporal.
Eternal existence is a theory proposed by spiritualists and religious people. According to this concept, after death, life exists on a different plane of existence. Spiritualists and religious people believe that the body is temporal, but the self, or soul is eternal.