The Word says: "Ye are come unto... the heavenly Jerusalem", and that "the Jerusalem that is above" (that is, the heavenly Jerusalem) "is our mother". Well, that says where we are, but it does not explain... we are going to be occupied with that to which we have come.
Now when you read these last chapters of the book of the Revelation you are inclined to think that it is all in the future. "The holy city, new Jerusalem, coming down out of heaven from God" - surely that belongs to some future time? Well, it may have a future aspect, but these Scriptures say that we have come there already. I know that that sounds rather mysterious, but in these hours which we spend together I think we shall be seeing exactly what it means.