I think, almost daily, of this passage from Robert Jenson:
The truly necessary qualification is not that the City’s streets will not be paved with real gold, but that gold as we know it is not real gold, such as the City will be paved with. What is the matter with gold anyway? Will goldsmiths who gain the Kingdom have nothing to do there? To stay with this one little piece of the vision, our discourse must learn again to revel in the beauty and flexibility and integrity of gold, of the City’s true gold, and to say exactly why the world the risen Jesus will make must of course be golden, must be and will be beautiful and flexible and integral as is no earthly city. And so on and on.