Here's a typical argument of religionist for "opening up" to god by an atheist:
Certainly I would never try to prove by scientific method that God is. However, if you are open to experimentation, I suggest you give God an opportunity to actually prove Himself. Here’s what I recommend: Tell him (as if you believe He’s real) that you would like for Him to prove Himself by saving you from your errors in life (sin). Say something like :” If You are there, please begin to change me to be as You would have me to be.
Of course if You are there and begin to affect me and change me from within, I will, of course, become a believer.” I suggest for the sake of the experiment that you speak sincerely
Here's my reply:
First, isn’t it interesting that your god always shows up where he can’t be objectively observed – exactly like a nonexistent entity.
Second, isn’t it interesting that he needs your “openness” or “permission” to do his wonderful works – just like a case of self-hypnosis by a true believer.
Third, in the remote possibility that your god is real maybe he can open himself to human goodness and stop burning people who don’t believe in him in hell for all eternity.