Faith in some form of afterlife is an important aspect of many people's beliefs. For example, one aspect of Hinduism involves belief in a continuing cycle of birth, life, death and rebirth (Samsara) and the liberation from the cycle (Moksha). Eternal return is a non-religious concept proposing an infinitely recurring cyclic universe, which relates to the subject of the afterlife and the nature of consciousness and time. Though various evidence has been advanced in attempts to demonstrate the reality of an afterlife, these claims have never been validated. For this reason, the material or metaphysical existence of an afterlife is considered by many to be a matter outside the scope of science.