Psalm 90:2 Before the mountains were brought forth, or ever You had formed the earth and the world, even from everlasting to everlasting You are God. (MKJV)
One reason that some people don’t believe in God is that they have a wrong idea of what is meant by the word “God”. When they hear the word “God” they think of someone or something far less than what God is really like. They really shouldn’t believe in a little “God”, because the real God is greater than we can understand. Even though we can’t understand everything about God, we can understand some things about Him, because He created us to be able to understand Him partly. A young child can truly know their parents without understanding them completely.
God had no beginning and has no end. God made people, so people have a beginning and have to wait for the future. But, the Bible says God inhabits eternity. In other words, Gods lives in all time and beyond all time as if all infinity were the present (right now). It is impossible for people to know exactly what that would be like, but we can have some understanding. One way to translate God’s special name in the Bible is “I AM”. Among other things, this points to the idea that all time and eternity is “right now” for God. God understands how people have to remember the past, live in the present and wait for the future. But, God doesn’t need to remember the past or wait for the future because He already lives there.
Maybe this seems too philosophical for some people, but it is important to know this about God. If we didn’t, we couldn’t really trust God and depend on His promise to give us eternal life in joy. If God doesn’t know all of eternity, then how could He be sure that He will live forever much less promise to make us live forever? He couldn’t unless He already knows forever as if it was now. God has also told us that He is the only God and there is no other God. But if God doesn’t know all eternity, He wouldn’t know for sure that there is no other God because there might be another God whom He hasn’t met yet. If so, what if God met an even greater God? Then God would be servant to that God (and we could go on and on with “What if’s?”). But the true God who knows all eternity knows for certain that He will never end and never meet another God. People are left with a choice. They can trust that God is honest with us and really does know eternity and truly has the ability to guarantee us eternal life. Or they can distrust God and wonder if there is another God or if they are God themselves or if there is no God at all. Actually, the Bible indicates that the origin of evil when created beings rejected the truth of who God really is so that they could try to become their own God. People are still having that problem today.