Is there any legitimate way that we could say we complete Jesus? I would have doubted so, but there is this is Scripture:
And he has put all things under his feet and has made him the head over all things for the church, which is his body, the fullness of him who fills all in all.
What does this bold phrase mean? Here’s what Calvin commented on this passage:
The fullness of him that filleth all in all. This is the highest honor of the Church, that, until He is united to us, the Son of God reckons himself in some measure imperfect [in the sense “incomplete”]. What consolation is it for us to learn, that, not until we are along with him, does he possess all his parts, or wish to be regarded as complete! […]
That filleth all in all. This is added to guard against the supposition that any real defect would exist in Christ, if he were separated from us. His wish to be filled, and, in some respects, made perfect in us, arises from no want or necessity; for all that is good in ourselves, or in any of the creatures, is the gift of his hand; and his goodness appears the more remarkably in raising us out of nothing, that he, in like manner, may dwell and live in us.
Basically, Jesus is complete in and of Himself, yet He has sovereignly and freely chosen to be with us, to be our God, to be for us. Although He can be complete by Himself, He out of His own freedom chosen not to be complete without us. He has created in Himself room for us to fill! Amen! What a gracious honor!