Which god?

The above is my go to response to the question "Do you believe in God?"

It never fails to give them pause, but usually they follow up with something along the lines of "Well the one true God of course. the God of the Bible."

At that point they have lost the argument as all you have to do is to start listing off the thousands of gods that have been worshiped by man, and ask them why THEIR deity is so special.

That usually ends the discussion, though if it does not you can always ask them what their argument against believing in Set, or Padma, or Odin entails and then ask them how that same criteria fails to disprove the one God that they have chosen to believe is real.

It is always good to remind religious people that we are ALL atheists.

It is just that some Atheists believe in one less god than the majority do.

Still my favorite response to why I'm an Atheist.

It is also why I don't call myself an agnostic.

The next time a religious person asks you why you don't call yourself an agnostic, since you can't prove there is no God, instead of an Atheist. Simply ask them if they are an agnostic or an atheist concerning Thor, or Zeus, or Ra, or any other among the pantheon of Gods not worshiped by their particular religion.

That's usually the end of the conversation.