“God’s name is manifestatively glorified here only in the proportion in which His Kingdom comes to us and His will is down by us…. But seek ye first the Kingdom of God and His righteousness’ (Matt. 6:33). But though men ought to glorify God’s name upon earth, yet of themselves they cannot do so. God’s Kingdom must first be set up in their hearts. God cannot be honored by us until we voluntarily submit to His rule over us.
‘Thy Kingdom come.’ Whose Kingdom is being referred to here? Obviously, it is that of God the Father, yet it is not to be thought of as something separate from the Kingdom of the Son. The Father’s Kingdom is no more distinct from Christ’s than ‘the Church of the living God’ (1 Tim. 3:15) is something other than the Body of Christ or than the ‘Gospel of God’ (Rom. 1:1) is something different from ‘the Gospel of Christ’ (Rom. 1:16), or than ‘the Word of Christ’ (Col. 3:16) is to be distinguished from the Word of God. But Christ does mean, by the words ‘Thy Kingdom,’ to distinguish sharply the Kingdom of God from the kingdom of Satan (Matt. 12:25-28), which is a kingdom of darkness and disorder. Satan’s kingdom is not only opposite in character, but it also stands in belligerent opposition to the Kingdom of God.
The Father’s Kingdom is, first and more generally, His universal rule, His absolute dominion over all creatures and things. ‘Thine, O Lord, is the greatness, and the power, and the glory, and the victory, and the majesty: for all that is in the heaven and in the earth is Thine; Thine is the Kingdom, O Lord, and Thou art exalted as Head above all’ (1 Chron. 29:11). Second, and more specifically, it is the external sphere of His grace on earth, where He is ostensibly acknowledged (see Matt. 13:11 and Mark 4:11 in their contexts). Third, and more definitely still, it is God’s spiritual and internal Kingdom, which is entered by regeneration, ‘Except a man be born of water and of the Spirit, he cannot enter into the Kingdom of God’ (John 3:5).
Now as the Father and the Son are one in nature, so is Their Kingdom the same; and thus it appears in each of its aspects. Concerning the aspect of providence, we read, ‘My Father worketh hitherto, and I work’ (John 5:17), signifying cooperation in the government of the world (Heb. 1:3). Christ now holds the mediatorial office of a King by virtue of His Father’s appointment (Luke 22:29) and establishment (Ps. 2:6). When the Kingdom is viewed very specifically as a reign of grace set up in the hearts of God’s people, it is rightly called both “the Kingdom of God” (1 Cor. 4:20) and ‘the Kingdom of His dear Son’ (Col. 1:13). Viewing the Kingdom in regard to its ultimate eternal glory, Christ says that He shall drink the fruit of the vine with us ‘in [His] Father’s Kingdom’ (Matt. 26:29), yet it is also called ‘the everlasting Kingdom of our Lord and Saviour Jesus Christ’ (2 Peter 1:11). Thus it should seem perfectly natural to us when we read these words: ‘The kingdoms of this world are become the kingdoms of our Lord, and of His Christ’” (Rev. 11:15).
-A.W. Pink, The Beatitudes and the Lord’s Prayer, 91-93.