This is one of the best comebacks I’ve ever seen. I may just use this one day. Enjoy.
One day a 6 year old girl was sitting in a classroom. The teacher was going to explain evolution to the children.
The teacher asked a little boy:
TEACHER: Tommy, do you see the tree outside?
TEACHER: Tommy, do you see the grass outside?
TEACHER: Go outside and look up and see if you can see the sky.
TOMMY: Okay. (He returned a minute later) Yes, I saw the sky.
TEACHER: Did you see God?
TEACHER: That’s my point. We cann’t see God because he isn’t there. He doesn’t exist.