This is a well-liked discussion starter. This will turn any conversation on the temporal (earthly) domain into a discussion about the eternal realm. If you think it is acceptable for that particular conversation, give it a try.

• “If God could do a miracle today for you or your family, what would it look like?”
  or
• "What would it look like if God performed a miracle for you or your family today?"

(You can search for "icebreaker" to see additional examples.)