Whether you believe in God or not you still have an underlying assumption that you take for granted, Christians take the evidence of the world around us to say God exists, an Atheist looks at the same evidence and says God does not exist. The issue here is ultimately that the statement God exists is formally unprovable and totally unscientific. This means that ultimately you have faith that God does not exist and others have faith that he does, neither sides can formally prove themselves correct.
Andrew,
Whether you believe in God or not you still have an underlying assumption that you take for granted, Christians take the evidence of the world around us to say God exists, an Atheist looks at the same evidence and says God does not exist. The issue here is ultimately that the statement God exists is formally unprovable and totally unscientific. This means that ultimately you have faith that God does not exist and others have faith that he does, neither sides can formally prove themselves correct.