You call upon God.
Where is your God?
Prove you're right.
It wasn't until I moved away from my hometown that I heard of atheism as being anything other than a condition that the most troubled people suffered from. I knew that being seen as being "too religious" could be tricky with people, and as a new public school teacher, I was well aware of the separation of church and state as it might play out in a classroom, but it's pretty safe to say that I did not give a whole lot of serious thought to how my own beliefs compared to others' until further into my adult life.
I then became good friends with an atheist. He challenged me and I challenged him. He was a good six or seven years older than me so I could not quickly pass off his ideas as immature, and unlike what I'd naively thought of atheists in my early years, my friend was intelligent, generous, understanding, and an all around "good guy". For awhile I considered it a goal of mine to make him rethink his beliefs (or non beliefs). I asked him lots of questions. He returned my questions with his own. I tried to let that difference between us fade to the back burner but it was tough for me to do that. Despite my tenacity, he was patient with me.
However, long after he and I parted, a result of a job change, I became acutely aware of others like him, young people, old people, all good people who did not believe in a higher power. I found myself giving the matter a lot of thought. Correction. I still give the matter a lot of thought. I think about atheism so often in fact, being exposed what seems to be a higher and higher percentage of non-believers in my life, that I sometimes question my own beliefs. And then that scares me greatly.