Ephesians 1:18 The eyes of your understanding being enlightened; that ye may know what is the hope of his calling, and what the riches of the glory of his inheritance in the saints, 1:19 And what is the exceeding greatness of his power to us-ward who believe, according to the working of his mighty power, 1:20 Which he wrought in Christ, when he raised him from the dead, and set him at his own right hand in the heavenly places, 1:21 Far above all principality, and power, and might, and dominion, and every name that is named, not only in this world, but also in that which is to come: 1:22 And hath put all things under his feet, and gave him to be the head over all things to the church, 1:23 Which is his body, the fulness of him that filleth all in all.
All those positions of rank and authority (principalities and powers) in those High places are His; are under His authority.
He is over all; in them and through them.
He fills them all in the sense that each is under His authority.
They in turn, each govern over their particular aspect of said realm with Him.
Who are those positions?
Or rather, who will one day fill those positions of authority He is over?
The Body of Christ.
The best is yet...to come.
Colossians 3:4 When Christ, who is our life, shall appear, then shall ye also appear with him in glory.