Eternity and Everlastingness: What Is the Difference?

Question 2107.

Eternity and everlastingness sound like two words for the same thing, and most of us use them interchangeably without a second thought. God lives for ever; God is eternal; surely that is one truth dressed in two coats? Not quite. The difference between eternity and everlastingness is one of the most clarifying distinctions in all of theology, and once you see it, a whole shelf of Bible verses comes into sharper focus.

Here is the short version. Everlastingness means existing through time without end – endless duration. Eternity, as Scripture ascribes it to God, means something far grander: God stands above time altogether, because time itself is something He made. He does not ride the river of time for ever; He made the river. Let me unpack why eternity and everlastingness must not be confused.

Eternity and Everlastingness: Two Words, Two Ideas

Picture two ways of never ending. The first is a line that started somewhere and simply never stops – moment after moment after moment, with no final tick of the clock. That is everlastingness, what the older writers called sempiternity: unending existence within time. An angel has it. Your own soul, remarkably, has it from the moment God creates it. Everlastingness is impressive, but it is a creature’s kind of for ever.

The second way of never ending does not involve a line at all. It belongs to the One who made lines. When we distinguish eternity and everlastingness, we are saying that God’s relationship to time is not that of a very old traveller who has been on the road longer than anyone else. He is the Maker of the road. Boethius, writing in the sixth century, gave the classic definition of eternity: the whole, simultaneous and complete possession of unending life – in his Latin, tota simul, “all at once”. God does not have His life in instalments, as we do. He has all of it, all at once.

A homely illustration may help hold eternity and everlastingness apart. Think of a composer and a melody. The melody exists note after note; let it never resolve and its existence is everlasting in its way – it simply never stops. The composer is not like that. She does not live at any bar line within the music; she holds the whole tune, first note and last, in a single act of mind. That is only a creaturely sketch of the difference between eternity and everlastingness – note-by-note life without end on the one hand, and the whole-song life of God on the other – but it points in the right direction.

Everlastingness: Time Without End

Do not mishear me: Scripture gladly uses the language of endless duration for God, and so should we. “From everlasting to everlasting you are God” (Psalm 90:2). The Hebrew word is olam, time stretching out beyond all reckoning, horizon beyond horizon. The Bible is not embarrassed by this language, and a believer who says “God lives for ever and ever” has said something true and glorious. The question is whether that is all there is to say – whether eternity and everlastingness are, in the end, the same size.

But if endless duration were the whole story, some strange consequences would follow. A God who existed only within time would have a past that is gone for Him, just as ours is gone for us. He would experience the future as not yet arrived. He would, in a real sense, be waiting – the oldest being in the universe, but still a being inside the universe’s clock, carried along by it one moment at a time. The Bible’s God is not like that, and the Bible itself tells us so.

Eternity: The God Who Made Time

Paul writes that God gave us grace in Christ Jesus “before the ages began” (2 Timothy 1:9), and that eternal life was promised “before the ages began” (Titus 1:2). The ages – the whole sweep of time – began. Time is a created thing, brought into being alongside space and matter, as I have argued in Did God create time? and Was there a “before” before creation? If time is a creature, then the Creator cannot be confined within it, any more than a novelist can be trapped inside chapter three of her own book.

This is what Isaiah means when he names God “the One who is high and lifted up, who inhabits eternity” (Isaiah 57:15). God does not inhabit the years the way we do; He inhabits eternity, and from that high place He stoops to dwell “with him who is of a contrite and lowly spirit”. And it is surely what Jesus claims with those staggering words in John 8:58: “before Abraham was, I am.” Not “before Abraham was, I was” – which would make Him very old – but “I am”, the present tense of the divine name, the life that is whole and complete all at once.

So the distinction between eternity and everlastingness comes to this: everlastingness is unlimited time; eternity is lordship over time. The first describes a creature that never stops; the second describes the Creator who never started.

How Scripture Holds Both Together

Now, someone may ask: if eternity and everlastingness really differ, why does the Bible mostly speak in the language of duration – “for ever”, “from everlasting”, “throughout all generations”? Because God speaks to us in words we can carry. We are time-bound creatures, and endless duration is the closest picture of eternity our minds can hold. The duration language is true as far as it goes; the eternity language tells us it goes further than we can follow. Psalm 102 is the place where both notes sound together, and it is worth hearing in full:

“Of old you laid the foundation of the earth, and the heavens are the work of your hands. They will perish, but you will remain; they will all wear out like a garment. You will change them like a robe, and they will pass away, but you are the same, and your years have no end.”

Psalm 102:25-27 (ESV)

Notice the movement. The heavens – the most permanent-looking things we know – are a garment that wears out. God remains, and He remains the same. His “years” have no end, yet those years do not age Him, change Him or carry anything away from Him. That is duration language straining towards eternity, and you can read the whole psalm here. Peter adds the other side of the coin: “with the Lord one day is as a thousand years, and a thousand years as one day” (2 Peter 3:8). Time simply does not press upon God as it presses upon us.

Why the Difference Matters

Is the distinction between eternity and everlastingness just theological hair-splitting? I do not think so, for at least three reasons. First, it underwrites God’s unchangeableness. A God inside time would be a God with a biography, accumulating experiences, perhaps mellowing or souring with age – and a God who changes is a God whose promises might change. Because God possesses His whole life at once, “I the LORD do not change” (Malachi 3:6) stands rock solid, as I have explored in What is divine immutability?

Second, it secures God’s knowledge of the future. A being who is everlasting but time-bound could only guess at tomorrow, however shrewdly. The God who stands above the whole line of history sees it entire, the way you see a parade from a hilltop rather than from the kerb. That is why He alone can declare “the end from the beginning” (Isaiah 46:10), and why prophecy is His signature.

Third, it dignifies what God offers you. When Scripture promises believers “eternal life”, it does not promise bare endlessness – which, depending on the company, could be a threat rather than a gift! It promises a share in the life of the eternal God Himself, life of a new quality with an unfailing source; the gap between eternity and everlastingness is, in the end, the gap between the Giver and the gift. We remain creatures, and our existence will always be everlasting rather than eternal in the strict sense; we will never possess our life all at once as God does. But the life we receive flows from His eternity, and it can no more run dry than He can.

A Caution Against Over-Confidence

I want to add one note of pastoral honesty. Exactly how God’s eternity engages with our timeline – how the timeless One hears Tuesday’s prayer on Tuesday, grieves over sin when it happens, and entered history in the person of Jesus – involves real mystery. Scripture asserts both sides without showing us the joints, and the precise mechanics belong to “the secret things” that are the LORD’s (Deuteronomy 29:29). I would rather affirm both truths plainly than force them into a tidy scheme. What we can say with confidence is this: God is never early, never late, never hurried and never caught out, because eternity and everlastingness meet in Him without strain – He inhabits the one and fills the other.

So, now what?

Take the difference between eternity and everlastingness into your worries about time, because nearly all our worries are about time. We regret the past, we dread the future, and we feel the present slipping through our fingers like sand. Your God holds all of it at once. The past you regret is fully present to Him, and at the cross He dealt with it. The future you fear is fully present to Him, and He is already there, just as He is here. Nothing about next year will be news to Him.

And take it into your worship. We serve a God who is not simply older than the mountains but stands behind the very ticking of the clock – and this God, who inhabits eternity, chose to enter time, to be born in a stable, to grow, to wait, to suffer and to die for us. The eternal One submitted Himself to hours and minutes for your sake. When you grasp the difference between eternity and everlastingness, that condescension becomes breathtaking.

So here is my challenge: stop treating God as if He were simply the oldest thing in your universe, and start treating Him as the Lord of every moment in it – including this one. What would you entrust to Him today if you believed, down to your bones, that your whole story is already safe in His hands?