In this short lecture, I talk about the existence and origin of the universe actually shows us that God must exist. The universe must have an explanation outside of itself since it is contingent – that is, not necessarily existing. God, if he exist, would be necessarily existing and is thus a perfect candidate for the explanation for the universe.
Similarly, the fact that the universe came into being 13.7 billion years ago must have a cause since everything that begins to exist has a cause. Since the universe is all of time and space such a cause must be spaceless, timeless, immaterial and very powerful. That’s what we mean by God.