Let’s start with a quick experiment. You can grab three coins and actually do the experiment, or just do a thought experiment.
Drop one coin and watch it fall. Do this again. Hold out the third coin.
If you were to do this again, what do you think would happen? If you could get ten good Christians to pray that this next coin wouldn’t fall, would it still fall? How about one thousand faithful Muslims? How about one billion people of any faith? I think that it would still fall. Drop the third coin.
Our understanding of the world around us, and our abilities to predict what will happen are based on naturalism -- the basis of science. Naturalism is how all people live their lives most of the time. --Why Atheism, by Mark Thomas
"Why Atheism" is a good primer on scientific naturalism and atheism.