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 Buddhism, eternity is associated with the soul's existence after death. It represents a state of being that transcends the physical world, suggesting that life continues in some form indefinitely, either in a paradise or through cycles of rebirth.