The shirt off his back

M and I were walking over to the grandparents' and I mentioned I was chilly and wished I would have brought my jacket.  He said he was okay because he had long sleeves, but his legs were a little cold in his shorts.  Then he said, "I can give you my shirt, mom."  I told him I was pretty sure he would be cold with no shirt.  He said it was alright.  "God will keep me warm.  If I think of you first and give you my shirt, God will take care of me."  Of course I took the opportunity to explain the saying to my literal boy, wondering if anyone else had ever really lived out the saying.