We are citizens of Christ’s kingdom, which is a heavenly citizenship at the moment (Philippians 3:20), with implications for our time on earth, while we pray for His kingdom to come (Matthew 6:10) and for Him to reign and to reward His saints (Revelation 11:18).
There is a remaining battle, but the outcome is secure. “They will make war on the Lamb will conquer them, for he is Lord of lords and King of kings, and those with him are called and chosen and faithful” (Revelation 17:14). By His blood He ransomed us as a people for God, and has made us “a kingdom and priests to our God, and [we] shall reign on earth” with Him (Revelation 5:10).
Jesus is our King, and we anticipate the establishment of His reign at the right time. And Jesus is also our Head, which means we already are under Him, guided by Him, and connected to Him.
Our relationship to Him as King means that His authority has dignity and dominion. Our relationship to Him as Head means that His authority is natural and unforced, and also permanently attached. “The Head automatically belongs to the congregation as the mystical body. It is inseparable from it” (Kuyper, Pro Rege, 291).
God’s power was on display:
in Christ when he raised him from the dead and seated him at his right hand in the heavenly places, far above all rule and authority and power and dominion, and above every name that is named, not only in this age but also in the one to come. And he put all things under his feet and gave him as head over all things to the church, which is his body, the fullness of him who fills all in all. (Ephesians 1:20–23)
We are citizens, we are members. There is no body without a head. We could not function without being joined to our Head. We remember what brought us into that supernatural and inseparable fellowship around the Lord’s Table.