If Christians insist that the Universe needs a creator, then what about the Creator Himself? Where did he come from? What was his first cause? Who made God?
Whenever I’m asked this question, I instinctively think of the of the two people talking about what holds the World up. One says to the other “I think the World is held up on the back of a turtle.” The other responds “and what is holding up the turtle?” The first man answers “another turtle.” “Then what holds up the second turtle?” asks the other man? “Well it’s another turtle again.” And so the conversation goes on until the second man exclaims “It’s just turtles all the way down!”
This gets us to the nub of the problem. We all at some point have to deal with the question of eternity and infinity.
Some scientists have in recent years entertained the possibility that the Universe may be infinite and therefore eternal. Mind you, when they say that, they are lining up with ancient Greek philosophy and Eastern thought. However, generally speaking, modern science recognises that the Universe is finite with a beginning and end point in space and time. The beginning is usually recognised as coinciding with the Big Bang.
The point is that whether or not you think of the Universe as eternal or finite, you still end up with something that is eternal. If you think that the Universe is finite, then it does need a cause. There must be something beyond and behind the Big Bang. What was it that exploded?
So, we don’t have a choice on the existence of eternity. What we do have a choice about is the question “What is eternal?” Atheists must conclude that Matter is eternal. Christians say that it is the Creator God, a living, personal God who is Love, Holy, Wise etc.
In other words, the real question is whether you believe that the eternal cause of everything is personal or impersonal, sentient or insentient.
This brings us back to the point in our last answer. Those who refuse to believe in God are making a conscious choice in the face of clear revelation. We look around us at a world teaming with life. We think about our own lives, the fact that we are thinking and reasoning, the way that we love others our response of righteous anger to injustice. Where on earth do those things come from? Are we really meant to accept that these things are just chemical processes designed to help us survive? You see, if that’s all they are, then even my very thought process, my reasoning becomes worthless. It’s just a chemical process to help me survive now. So can I trust what it tells me about science, philosophy, history etc?
It makes more sense to conclude that if this Universe has living creatures who think, love and care in it, then those qualities are eternal too. We were made by someone who is living, thinks, loves and cares. The Eternal God reveals who he is to us.
Now, when we come to the Gospels, Jesus makes the staggering claim that he is eternal, John hears him say to some of his opponents, “Before Abraham was, I am.” Jesus claimed to exist all through history. John comes to the conclusion that Jesus is telling the truth and starts his Gospel “In the beginning was the Word and the Word was with God and the Word was God.” This is another way of telling us that God is Trinity, one God in three persons. Why is this important? Well, in another place, John will tell us that “God is Love.” We know this because the Father eternally loves the Son and the Son eternally loves the Father whilst both Father and Son eternally love the Spirit.
This is why it is good news to say that God is eternal. No-one made God. He has always been and he always will be. He is always love. This means that we can depend on God and trust Him. The wasn’t a point where he started existing or started loving and there won’t be a time when he stops existing or stops loving.
 Note for example how Stephen Hawkin acknowledges that in terms of 2 dimensions, space has a beginning and time has a beginning with the Big Bang. He then introduces a third dimension called “Imaginary Time” (which seems a rather unfortunate name for a scientific hypothesis!) and suggests that along that dimension we have something without beginning or end. Some readers may observe that Hawkin is beginning to describe something that transcends space and time. See http://www.hawking.org.uk/the-beginning-of-time.html (accessed 21/02/2017).
 On this see Keller, The Reason for God, 128-129.
 See Keller, Making Sense of God, 34-36.
 John 8:58.
 John 1:1.
 1 John 4:8.