The treasure of being a son of God
The apostle Paul summed it up well when he said, “Christ in you is the hope of glory.” Col 1:27. Unless Christ is in you, there is no hope in the resurrection nor will there be any glory in the resurrection. The only thing that will be glorified in the resurrection is the perfect will of God the Father seen in the completed work and offering of Jesus Christ. For those who are in Christ as part of His completed work, the resurrection and the revealing of our sonship in Christ will be glorious.
As glorious as it will be in that day, when we appear like Him, equally glorious is the revealing of Christ in us while we live this life. Only those who are in Christ can reveal the life of Christ to the world.
In this life we treasure our calling to be sons of God. We consider it to be the highest of all callings, higher than any other title or status. Every other title we receive in this life is with a view to glory that is for this life alone. And like the flowers of the field their glory is revealed one day but is gone the next.
The calling to unique sonship in Christ is something of immense worth. In this life, our rejoicing begins with the hope of and then the call to sonship. As we mature, we further rejoice in the lived expression of our sonship. We rejoice as the hand of our loving Father fashions and forms us into the son He foreknew. As we receive from His hand, we rejoice knowing that we are doing the works He prepared for us. We rejoice as we are conformed to His will even in the midst of suffering.
As we live as sons of God we are strengthened to keep seeking the things that are from above (where Christ is seated) and not the things that are from the earth. We live by the faith of the Son of God and are not persuaded or distracted from the things that are unseen and eternal by the things that are seen and passing away. 2 Cor 4:18. We know that nothing can separate us from the love of God the Father. Rom 8:38-39. In faith we press on toward the goal for the prize of the upward call of God in Christ Jesus. Php 3:14. And in hope, we wait for that great day, knowing that when Christ who is our life is revealed, then we will also be revealed with Him in glory. Col 1:1-4.

