You can also remind them that even Aristotle, the Greek who is credited with the foundations of most of modern "science", proved that God existed!
His arguement:
- There exists movement in the world.
- Things that move were set into motion by something else.
- If everything that moves were caused to move by something else, there would be an infinite chain of causes. This can't happen.
- Thus, there must have been something that caused the first movement.
- From 3, this first cause cannot itself have been moved.
- From 4, there must be an unmoved mover. (i.e. God)
If even a heathen Greek figured it out around 350 BC, why is it taking atheists so long?