It is the common view of all who live by reason that God is eternal. So we must ponder what eternity is, for this will clarify for us his divine nature and his knowledge alike. Eternity, then, is the total and perfect possession of life without end, a state which becomes clearer if compared with the world of time; for whatever lives in time lives in the here and now, and advances from past to future. . . .So what does rightly claim the title of eternal is that which grasps and possesses simultaneously the entire fullness of life without end; no part of the future is lacking to it, and no part of the past has escaped it. It must always appear to itself as in the present, and as governing itself; the unending course of fleeting time it must possess in the here and now.
- Bl. Anicius Manlius Severinus Boethius, The Consolation of Philosophy.