That kingdom is here. You are still in it, you have just lost the eyes to see it.
The kingdom is not to be gained, eyes have only to be regained, rediscovered – and it is not a difficult phenomenon, because you once had those eyes. They are only covered with dust.
The mirror has become covered with a layer of dust, but the mirror is there. Remove the dust, and again things will become beautiful, again things will have meaning and significance .