Thy kingdom come. Let there come the full establishment of thy realm. The prayer passes from the personal acceptance in the heart of God's revelation of himself to the consequent result. The clause has a much wider meaning than the development and spread of the Church, or even the personal return of Christ at the second advent.
It speaks of that which shall be the issue of both this and that, the final and perfect establishment of God's realm, in which all men will do him willing service, and all habits and customs, individual and social, will be such as he approves of.
Dr. C. Taylor ('Sayings,' etc., Exc. 5.) points out that the coming of the kingdom and the sanctifying of the Name are brought together in Zechariah 14:9; Weiss, ' Life,' 2:349, with many others, says that our Lord probably adapted the frequent Jewish prayer for the coming of the kingdom of Messiah.
Thy will be done. Let thy will come into complete existence ( γενηθήτω; of. "Let there be light," Genesis 1:3, LXX.). The thought is not merely God's will realized in this or that action, whether performed or endured by us (cf.
Matthew 26:42; Acts 21:14), but God's will as a whole coming into full being. God's will is always in ideal until it is accomplished in act. The connexion of the clause with what has gone before is therefore this—the acceptance of God's manifestation of himself leads to the establishment of his realm, and this to the realization of his will, which until then is only ideal (cf.
Matthew 5:18, note, end). If this be all the meaning of the words, they express, in fact, only the ultimate result of the consummation prayed for in the preceding clause (hence this portion of the prayer was in itself complete without our present words; cf.
Luke 11:2); but since it is so far a distinct thought that it would not immediately suggest itself, it has a worthy place in the fuller form of the prayer. Possibly, however, more may be intended. The full establishment of the kingdom may be only a part of his loving will, which may, for all we know, have countless other things in view.
The highest prayer that we can make in the furtherance of God's cause is that his gracious purpose, his will may be fully brought about. In earth, as it is in heaven; as in heaven, so on earth (Revised Version).
Probably the words are to be joined to only the immediately preceding clause. In heaven God's will is already realized; not yet on earth, where sin has entered.