Is there any evidence for the existence of God?

You can know God exists based on the evidence in the universe. Here are three simple pieces of evidence for the existence of God:

1. The very fact that you and everybody else thinks about God points to His existence. if you were the only person who thought about God, then we could just say that you have an imaginary friend. but everyone thinks about God. That's more than just coincidence.

2. Everything in the universe has a cause. if something doesn't have a cause, it doesn't exist. But what caused the causes? In other words, when you go back in the string of causes, there must have been a first cause to get all of the other causes going. An infinite string of causes would be impossible. And the first cause must itself not be caused. It must have pre-existed. Science now believes that the universe had a beginning, sometimes referred to as the Big Bang. The question is, where did the Big Bang come from? The only logical answer is that it was initiated by the first cause. It is reasonable to believe that the first cause is God, who has always existed.

3. The universe and everything in it has amazing order, harmony, purpose, and design. if you saw a beautiful Ferrari sitting in your driveway, would you assume that it just appeared out of nowhere, or would you believe that someone put it there? Would you believe that all of the parts and pieces assembled themselves, or would you believe that someone designed and built the car? The same is true with the universe. Everything is so fined tuned for life that an intelligent designer must have been behind it all. You can't explain creation from random mutation or chance.

Well, if God created the universe and everything in it, then He created you.
Wouldn't you think he did it for a reason? And if so, don't you want to know the reason?

from Bible Answers to Life's Big Questions, Bruce Bickel & Stan Jantz