# Eternity

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Eternity
Eternity personified, holding the ourobouros. Caryatid in the apse of Milan Cathedral (1611).

While in the popular mind, eternity (or foreverness) often simply means existence for a limitless amount of time, many have used it to refer to a timeless existence altogether outside time. By contrast, infinite temporal existence is then called sempiternity. Something eternal exists outside time; by contrast, something sempiternal exists throughout an infinite time. Sempiternity is also known as everlastingness.[1]

There are a number of arguments for eternity, by which proponents of the concept, principally Aristotle, purported to prove that matter, motion, and time must have existed eternally.

## The idea of eternity

The metaphysics of eternity might be summarized by the question: can anything be said to exist "outside of" or independent of Time/Space, and if so how and why? Some consequential metaphysical questions of some importance are then: can "information" be said to exist without, or independent of, the human mind, and, if so, what would be the content and "purpose" of such information?