Mmmmmm ... I'm afraid it's my character that I want to leave them with a blasting comment before I "move on" - your comments have given me some ideas - I'm searching for something short and snappy to do with Zeus I think..............

Just say 'That's fine: so I don't need to believe in him, and everything's great just as it is - that's good to know.'
Or - 'Well, at least there's some evidence that I exist!'

"I don't need a fairy tale to believe in me, I believe in myself"

Smug aphorisms can be annoying but they are best ignored. Sort of like how when you are passed on the street by a mutterer and you tell yourself, "don't ... make ... eye ... contact ..."

Just say thanks n move on...or that u don't care. Homey, I live right smack n the bible belt and my daddy is uberchristian. God all the time. Used to drive me crazy until a friend pointed out to me that he isn't specifying which God! Could be Zeus, could be pan, could b the universe itself. Let them bless u n move on. If they get annoying and pushy, then tell them they r annoying and pushy. U don't have to b nice to anyone not nice to u.

"F-ck off"...?