“Sure wish you can talk to my dad Ray. He's an atheist and so difficult to talk to about God.” Ingrid Urey Bolanos

This is how I would talk to your dad if I had a chance. I would say “I have a question for you. As an atheist, do you believe that nothing created everything?—which is a scientific impossibility.” If he says that he does, I would emphasize that it’s scientifically impossible, and leave him with that. If he doesn’t believe that (which most admit they don’t), I would follow up with “So you believe that something made everything, but it just wasn’t God?”

If he says a predictable “Yes, that’s right,” I would say, “Well you’re not an atheist. You’re an agnostic. You believe in some sort of creative force but you don’t think it was God. Let’s see if we can find out why you don’t want it to be God.” If he would let me speak further, I would take him through the Ten Commandments and we would find out that the issue isn’t intellectual. It’s moral. He’s a liar, a thief, a blasphemer and an adulterer-at-heart who knows that God exists (but as someone once wisely said) He can’t find Him for the same reason a thief can’t find a policeman.