If there were telephones in heaven who would you like to talk to? What would you say?
I have no evidence that there is any sort of heaven or hell, other than the ones we create in our present with our choices (including choices of beliefs).
As to communicating with dead people, if it were possible, the list is huge:
Plato, Aristotle, Jesus, Buddha, Einstein, Darwin, Tielhard de Chardin, Leonardo, Bertrand Russell, Rand, Wittgenstein, ……
Now that it is explicitly clear that this is an exercise in imagination; I would love to have a conversation with Jesus.
I would open with something like -
“Your story is really big in the time I live in, a couple of thousand years after your death. Lots of stuff seems to have been added to the tale of your life after your death. Seems like a lot of sun worshipping stuff about death and resurrection after the third day got added, and quite a few miracles to keep the believers believing; and you will find it hard to believe, but now most of the temples you spoke against, they are erected in your name.
The part of your story I love, is the aspect of someone seeing how the system doesn’t work, and is screwing everyone, and he speaks out against it, telling everyone to trust themselves, and to look within, and not to condemn anyone else, but rather have empathy.
So what exactly did you do?
What actually did you believe?
What sort of thoughts were you having?
I’d love to know, because from where I sit, it seems that most people have turned your message inside out and upside down, and now use it to support a series of authoritarian establishments.”
From there, I would mostly listen, and ask a few open questions at what seemed like opportune moments.
With Einstein, I would start with something like:
“You know how you opened your enquiry into relativity with the statement that from inside a closed box it was not possible to tell if you were in a gravitational frame or an accelerating frame. Well that just seems to be plain false. A simple bar, with a pendulum suspended from each end should tell you. If you are stationary with respect to a gravitational frame, the pendulums will not move with respect to each other. If you are accelerating with respect to a gravitational frame, then the free ends will move with respect to each other. All reality has some gravitational influence from something. Does that alter any of your later conclusions?”
That’ll do for starters.