It is not that Christ ceases to act for his people in heaven. No, their forerunner has passed into the heavens to serve them and do them good. He appears in God's presence for them. As their high priest, he transacts their affairs and he lives to make intercession for them forever. Nevertheless, his former toilsome and laborious work is over. The work was done for his Father and though he did it voluntarily and more than willingly, it was very demanding. Not only did he continuously go about doing good for men's bodies and souls but he knew great toil and hardship when he bore God's wrath and endured the law's curse by suffering and dying. He has now been set free and has relief from it all. He sits down to enjoy what he has done.
God looked with satisfaction and pleasure on the completed old creation, declared it very good, then rested from his activity. So Christ looked with complacency on the new creation wrought by his labours (the blessings of grace that have come through his blood that are applied to his people), saw it was very good, then rested from his activity.
From my book What Jesus is doing now, pp 65, 66