4 year old insight

The other morning right after the kids woke up, my son asked me a question I wasn't quite prepared for. Let me just preface the question with this: I am not a morning person. I never have been and never will be. That's why night shift agrees with me so well. It takes me a good 30-60 minutes to be fully functional and with it cognitively when I wake up. I'm grumpy and don't like to talk, but I've had to learn to do this after having 2 kids, one of which is a morning person. In college, my roommate and I had the same class schedule (same major) and she wouldn't speak to me until I had spoken first. Just to give you an idea of me in the morning. Back to my story. The kids and I were eating breakfast and Jacob asks me, out of the blue, "Mommy, why can't I go see God now?". Um, uh oh. There's me, half awake with a very loaded question. I stumbled through, telling him he has to live here for awhile before he can go see God, that Mommy wants him to stay here for a long time and that God decides when we go. He then said "but Clara, and the baby and you can come too, Mommy, and Daddy, too. Can I go now?" I can't remember exactly what I said after that due to my morning brain, but he quickly got bored with me and went back to his cereal. How do you answer a question like that? Honestly, I'm not sure even if he had asked me when I was fully awake that I would have done much better with that question.