Credit: link. I didn't write it, I thought it was pretty hilarious though!
"As an atheist, you will occasionally meet a non-atheist who wishes to argue against your belief system. If you are interested in discussing the matter, you may want to prepare yourself by learning these simple responses to common anti-atheist arguments.
The Bible says that atheism is wrong.
"The Bible also says some guy's donkey talked."
If you believe in God and are wrong, then it's no big deal, but if you don't believe in God and are wrong, you'll be punished eternally, so it's not a good idea to be an atheist.