"Sempiternal" redirects here. For the Bring Me the Horizon album, see Sempiternal (album).
For other uses, see Eternity (disambiguation).
Past ♦ Present ♦ Future,
Eternity, Arguments for eternity
Presentism ♦ Eternalism, Fatalism, Philosophy of Space and Time
Creation, End Times, Day of Judgement, Immortality, Afterlife ♦ Reincarnation, Kalachakra
Time measurement and Standards
Metric Time ♦ Hexadecimal time
Spacetime, Motion ♦ Space, Event ♦ Continuum, Time Travel ♦ (Grandfather Paradox)
Eternity is endless time. In philosophy and mathematics, an infinite duration is also called sempiternity, or everlasting. Eternity is an important concept in many religions, where the immortality of God or the gods is said to endure eternally. Some, such as Aristotle, would say the same about the natural cosmos in regard to both past and future eternal duration, and like the eternal Platonic Forms, immutability was considered essential.
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The metaphysics of eternity studies that which necessarily exists outside or independently of space and time. Another important question is whether "information" or Form is separable from mind and matter. Aristotle established a distinction between actual infinity and a potentially infinite count: a future span of time must be a potential infinity, because another element can always be added to a series that is inexhaustible.Aristotle likewise argued that the cosmos has no beginning. Euclid invoked this distinction instead of saying that there are an infinity of primes... rather that the primes outnumber those contained in any given collection thereof.
Eternity is often symbolized by the image of a snake swallowing its own tail, known as the Ouroboros (or Uroboros). The circle is also commonly used as a symbol for eternity, as is the mathematical symbol of infinity, .
The "endless knot," a symbol of eternity used in Tibetan Buddhism.
Annulus, a Celtis symbol of eternity.
Infinity symbol variations.