Eternity refers to an infinite or unending period of time, often considered beyond the limits of human understanding. It is a concept found in various fields, including philosophy, theology, and physics, where it can describe the timeless nature of the universe or the afterlife. In many religious beliefs, such as those in Christianity and Hinduism, eternity is associated with the soul's existence after death. This idea suggests that life continues in a different form or realm, emphasizing the importance of moral choices made during one's lifetime.