Romans 1:19-20 (KJV) Because that which may be known of God is manifest in them; for God hath shewed it unto them.
For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse:
Wise people will always accept that God exists. That means that those who refuse to accept the existence of God are foolish. That is not an insult, it is what the Bible says. The Bible says that the fool has said in his heart that there is no God. How would you use your brain and come to the conclusion that there is no God?
This is the bone of contention in the matter. It is true that many people in the world do not believe in the existence of God. They agree to the illusion that there is no God anywhere in the world. They are analyzing the existence of God with their mental reasoning. They are using human reasoning to ascertain whether there's a God.
There is a God. That God created them all. That God gives them the creative mind to invent many of their inventions. How come that we don't just walk into the forest and begin to pick some technological gadgets? Why don't we just see the computer come into existence? Why must our scientists and technologists need to sit down and work out something before we can have useful inventions? These whole questions reveal that there is a Creator who created all of us. There is a God, so believe in Him.