
According to the minimum total potential energy principle, eternity is the gradient of total potential energy, down which matter flows like a river. This flow of matter from the past (higher total potential energy) to the future (lower total potential energy) is known as time.
The minimum total potential energy principle dictates that Time is the universe's motion to ever more negative total potential energy:
Time resembles a field of negative energy and so a negative inertia.
- —Firsoff, Valdemar Axel. Facing the Universe Sidgwick & Jackson, 1966, p. 179
In the above quote, Time resembles the gradient of the universe's total potential energy (which is Eternity), but is not identical with it:
Time is the moving image of eternity.
- —Plato
Eternity is not endless time (i.e., endless movement, endless succession):
For Plato, eternity and sempiternity are incompatible because eternity excludes succession, before and after, while these are plainly entailed by sempiternity.
In Aristotle's metaphysics, eternity is the unmoved mover, understood as the gradient of total potential energy ("produces motion by being loved"). There are various kinds of love, the basic of which is gravitation. The gravitational centre of the universe is the planet Earth. The teleological nature of the unmoved mover implies that it attracts the universe's matter towards the futuremost maximally hierarchical configuration—the eschaton.
God creates the universe in six days and rests on the seventh—the day of Saturn, the Golden Age of Saturn. The ancient Roman solar year ended with the solar month of Capricorn (the eschaton), ruled by Saturn:
The year began in March and consisted of 10 months, six of 30 days and four of 31 days, making a total of 304 days: it ended in December, to be followed by what seems to have been an uncounted winter gap.
- —The early Roman calendar Britannica
Cronus/Saturn (Time Incarnate) is the son of Uranus (Time the Father) and Gaea (Matter the Mother). The zodiac is Eternity.
Boethius and Aquinas used Aristotle's "center-circle" analogy to illustrate God's eternity and its relation to time:
In this vision, all the events—past, present, and future—in a continuous temporal series (i.e., the circumference of the circle) are present to God in eternity (i.e., the center of the circle). Elsewhere, Aquinas says that, "God ... is wholly outside the order of time, stationed as it were at the summit of eternity, which is wholly simultaneous, and to Him the whole course of time is subjected in one simple intuition." Therefore, we can conclude that Thomas Aquinas's concept of God's eternity is an absolute timeless eternity. In timeless (i.e., "wholly outside the order of time") eternity, God knows all temporal events—past, present, and future—at once.
Template:Time in religion and mythology Template:Time in philosophy