Long time ago i read a book in arabic written by Mustafa Mahmood (an egyptian) it is called انا و صديقي الملحد or حوار مع صديقي الملحد “me and my atheist friend" or "debate with my athest friend" i am not sure of the name of the book
In it he writes about his encounters with atheists and in one place while debating an athiest he wrote:
Mustafa: You dont believe in the existence of something unless proven by feeling it or touching it or smelling.
Athiest: Yes.
Mustafa: So as per your concept since god does not exist as he cannot be touched, felt, smelled, and so on.
Athiest: Yes.
Mustafa: can i see your brain?
Athiest: no
Mustafa (facing towards his friends with him): can you see his brain?
Reply of freinds: no
Mustafa: So since i cannot feel, smell, touch, see your brain shall i say you are brainless?