1:21 Far above all principality, and power, and might, and dominion - That is, God hath invested him with uncontrollable authority over all demons in hell, all angels in heaven, and all the princes and potentates on earth. And every name that is named - We know the king is above all, though we cannot name all the officers of his court. So we know that Christ is above all, though we are not able to name all his subjects. Not only in this world, but also in that which is to come - The world to come is so styled, not because it does not yet exist, but because it is not yet visible. Principalities and powers are named now; but those also who are not even named in this world, but shall be revealed in the world to come, are all subject to Christ.

Ephesians 1:21 Parallel Commentaries

God's Inheritance and Ours
'In whom also we have obtained an inheritance, ... the earnest of our inheritance.'--Eph. i. 11, 14. A dewdrop twinkles into green and gold as the sunlight falls on it. A diamond flashes many colours as its facets catch the light. So, in this context, the Apostle seems to be haunted with that thought of 'inheriting' and 'inheritance,' and he recurs to it several times, but sets it at different angles, and it flashes back different beauties of radiance. For the words, which I have wrenched from their …
Alexander Maclaren—Expositions of Holy Scripture Ephesians, Peter,John

The Measure of Immeasurable Power
That ye may know ... what is the exceeding greatness of His power to usward who believe, according to the working of His mighty power, which He wrought in Christ.'--Eph. i. 19, 20. 'The riches of the glory of the inheritance' will sometimes quench rather than stimulate hope. He can have little depth of religion who has not often felt that the transcendent glory of that promised future sharpens the doubt--'and can I ever hope to reach it?' Our paths are strewn with battlefields where we were defeated; …
Alexander Maclaren—Expositions of Holy Scripture Ephesians, Peter,John

'According To' --I.
'According to the good pleasure of His will, ... According to the riches of His grace.'--Eph. i. 5, 7. That phrase, 'according to,' is one of the key-words of this profound epistle, which occurs over and over again, like a refrain. I reckon twelve instances of it in three chapters of the letter, and they all introduce one or other of the two thoughts which appear in the two fragments that I have taken for my text. They either point out how the great blessings of Christ's mission have underlying …
Alexander Maclaren—Expositions of Holy Scripture Ephesians, Peter,John