In heaven
In hell
somewhere in between
heaven.
"and the gates to heaven opened to one, and stayed shut thereafter."
If it was to be conceived in the mind, it would no more be Heaven, than it is the lost city of Atlantis. The concept of being somewhere where no pain exists is a foreign concept, truly elusive. For as humans we have always know pain - from when in the conception chamber, until eternal darkness. And yet, we pray.
Heaven is, though. It is a place that exists in the space between logic and the eternal illogic. It is conceived, carried, and buried all in the human mind.
We see glimpses of what it is, what it could be; No, scratch that; What we perceive it to be in our fleeting experiences of joy, of success, of melancholy, and even of pain.
I, for one, see it in the sound of my children's laughter. Funny how sound becomes sight. But such is Heaven. Such is Love. And hence, as human as we can be, we settle for this simple mathematical equation, and believe.