What's the BEST line you NEVER used on a Christian but wanted to REEELY bad...?
My fundie ex-mother-in-law once handed me a "letter from God", it was a project their pastor had given them, to write a hypothetical letter from God to themselves, and what they imagined God would say to them and about them, what advice God would give, etc.
It was all pretty mundane stuff, hardly worth commenting on, but the first thought that entered my head (but did not pass my lips) was...
"For the creator of the universe, God can't spell worth a damn...."
Had to bite my tongue to keep from blurting that out...
Well, shame on me, but I DIDN'T bite my tongue when I told the JW visiting my house that I was an atheist. She responded with surprise and asked me if I had always been an atheist or if something happened to me to make me an atheist.
My response: "Yeah - common sense."