“Don’t pray in my school and I won’t think in your church”

“Don’t pray in my school and I won’t think in your church” is a saying that has been printed on many gift items, such as T-shirts and bumper stickers. The popular saying against prayer in schools has been cited in print since at least 2000 and is of unknown authorship.
 
     
17 September 2000, St. Paul (MN) Pioneer Press, “God-free gathering challenges religion,” pg. 1B:
... “Don’t Pray In My School and I Won’t Think in Your Church,” ...
   
SciForums.com
Favorite Quotes Regarding Religion
notme2000
02-04-03, 05:44 PM
Don’t pray in my school and I won’t think in your church.
   
Google Books
March-April 2003, Yoga Journal, pg. 164, col. 1:
MIXED MEDIA stickers are wittiest— I liked “Don’t pray in my school and I won’t think in your church”— and build up your repertoire of religious lightbulb jokes
 
3 May 2003, Santa Barbara (CA) News-Press, “Barney’s Bits” by Barney Brantingham, pg. 2, col. 2:
John Smith passed on this bumper sticker: “Don’t Pray in My School and I Won’t Think in Your Church.”
 
BBC News
Last Updated: Saturday, 25 February 2006, 12:24 GMT
Democrats fail to find a message
By Justin Webb
BBC News, Washington
(...)
You can find entire religious credos summed up on the back of a Honda.
 
My favourite is: “Don’t pray in my school and I won’t think in your church.”
   
Google Books
Bumper Sticker Liberalism:
Peeling Back the Idiocies of the Political Left
By Mark Goldblatt
New York, NY: Broadside Books
2012
Pg. ?:
“Don’t Pray in My School, and I Won’t Think in Your Church”
...don’t sketch in my bathroom, and I won’t piss in your art gallery.