God is eternal. What we mean when we say that God is eternal is that He is infinite with respect to time. There are no limitations in terms of God's relationship to time. He is the sovereign Lord over time. In terms of scriptural support, there are Psalm 90, 102, and 93, Isaiah 40, 1 Timothy 1, and 2 Peter 3. It is probably the case that almost all theologians would in some sense want to affirm that God is eternal. By this, we mean that God has always existed, and that He will never come to an end. But when we ask what that means, that is when the theological arguments start. There are really two major views here of divine eternity, and on the face of it, these two views are mutually exclusive. We may call them 'atemporalism' and 'temporalism,' or we can call them 'atemporal eternality' and 'endless temporality.' Let us look at both of these very quickly. First of all, the atemporalist view is the one that has a very long history in the church. It was held by such ancient theologians as Athanasius, Augustine, Anselm, and Aquinas. This position holds that God is completely and utterly outside of time. Time in no sense applies to God. God holds all of His own existence in one timeless point. There is no sequence. There is no before and no after that applies to God. Further, He holds all of human history in one simultaneous glance. He knows the future and He knows the past exactly as He knows the present. They are essentially no different for Him. The atemporalist view holds that there are really two separate modes of existence: time and eternity. Man exists in time but God exists in eternity. This means that since God exists outside of time, since He exists in eternity, temporal statements are irrelevant to him.
The second view is the temporalist view. This position claims that time applies to God, just as it applies to us. There is sequence within God. There is before and after. He is aware of a sequence of events. He knows the present and He knows the future but He does not know the future in exactly the same way that He knows the present. God remembers the past and He anticipates the future. The real force or power for this position derives from the fact that timeless eternity is incoherent for human beings. We can talk about it but we cannot understand what we have said after we have said it. In fact, most of the arguments for the temporalist position are really arguments against atemporalism.
Let me give you some examples of some of these arguments. The temporalist will argue that atemporalism really makes it impossible for God to work in the world. The world we live in is time-bound, but if God is in eternity, He cannot work here. If temporal statements have no relationship to Him and for Him, He cannot work here. The claim that a timeless God works in time is by definition absurd. If God works in time, He must be in time. Second, the notion of a timeless person is also incoherent. A person, in order to be a person, must be able to remember, anticipate, reflect, deliberate, intend, and so forth. All these are time-bound events, but beyond that they are things that take time. There is a certain amount of duration with them. It takes time to remember something. It takes time to deliberate about something. These are actions that by their very nature are subject to temporal succession, duration, extension, and relationship. Third, Oscar Cullmann in his 1960 book Christ and Time argued that the idea of timelessness is not a biblical concept at all. It is rather an improper import from Greek philosophy. The Bible knows nothing of a time and eternity distinction at all. What the Bible actually articulates is a distinction between limited time, which is our time, and God's unlimited time. We might even call it our timeliness and God's timefulness. For example, when Scripture speaks of God as being eternal, it does not say timeless. What is translated as 'eternal' is in Greek a phrase which might better be translated 'into the ages of the ages' or sometimes it simply appears as 'the ages.' Our English word 'forever' might actually be a better choice. If I could use geometric terms, we are rays, for we have a beginning point and we go on forever. Then what is being suggested here is that God is a line. He has always existed and He will always exist. He is not a point.
We might take these two traditions and categorize them this way: the atemporalist position holds that time is irrelevant to God. The temporalist position holds that God is in time. The atemporalist response is, have you not just made God a creature of time? The temporalist position misses the important biblical fact that time is a creature of God. God is not a creature of time. Time is a created reality. As an essential feature of the created universe, time came into being along with matter at creation, and God existed before creation and therefore God is independent of time.
Can we resolve this? Philosophical and theological reflections on time have proven to be very complex, very convoluted creatures. Perhaps both of these positions are speaking some truth. Perhaps both of them are partly right. I think the atemporalist position is right in saying that God is the sovereign Lord over time, that He is not a constituent of the created order. But the temporalist position is also right in saying that God acts in time, and we temporally bound creatures always experience God in time. I think we can confess God is outside of time. That is all we can do. We cannot follow Him there. We cannot speak knowingly, rationally, or coherently about God outside of our space-time frame. So rather than locking God up in either a timeless eternity, which is really beyond our understanding, or making Him the creature of time, I think we can be better off to think of God as somehow beyond time yet working in it. What I suggest here is that God's relationship to time parallels His relationship to space. Time and space are usually thought of as the two fundamentally distinguishing characteristics of the universe, even at the level of physics. When we talked about transcendence, we did not seem to have any problem whatsoever in thinking about God as being different than we are yet also fully capable of coming close to us. God's relationship with space is that He is not in any sense spatial. He is not located in one point or another. He does not occupy any extensions spatially, but He can reveal Himself in space. I think the same thing is true regarding time. We should think of God's relationship to time on the same model. God is not located in time. He does not have temporal location. He is as much outside of time as He is outside of space, yet He can enter into temporality in the same way that He enters into space.