Dear Atheist Bob,
How do they know?
How do you actually know anything about God without having to have faith? Is there anyone who actually knows something in reality? It would be nice to hear from someone who doesn’t have that glassy look in their eye like they’re in a dream world.
Sincerely,
Dwight in Frankfurt
Dear Dwight,
I believe in God because he answers the prayers of thousands of amputees every year by growing their severed limbs back for them. Miracle!
Oh, wait, no he doesn’t. I forgot: he never ever heals amputees. He only heals people with internal sickness that already has at least a small chance of healing on its own anyway. Amazing that in all the millions of cases of people who claim to have been healed by God, not a SINGLE ONE has been the regrowth of a severed limb.

In fact, in what is certainly the most profound coincidence in history, NO miracle God has ever performed has EVER left so much as a shred of verifiable proof for science to look at. So many millions and millions of witnesses to miracles, and NONE thought to collect some sort of proof for skeptics.
And just in case the similarities between Christianity and cult superstition was lost on anyone up to this point, some Christians will complete the picture for you by recalling the old standard retort recited by so many psychics, crystal healers, new agers, pagans, and cultists before them: “It only works if you believe.”
Atheist Bob