Judging from the mass of Christian writings and from utterances in public address and prayer, this age is assumed by many, without question, to be the Kingdom of Christ; though no Scripture is found to warrant that conclusion.
There is a kingdom of God which embraces the entire universe, over which God is enthroned, and to this kingdom every enemy must finally be brought back to original subjection and adjustment, or be banished forever. This final victory is described in I Cor. 15:24, 25: “Then cometh the end, when He (Christ) shall have delivered up the kingdom to God, even the Father; when He shall have put down all rule and all authority and power. For he must reign, till he hath put all enemies under His feet.”
There is a still more extensive body of Scripture which anticipates a literal kingdom of righteousness and peace upon the earth; this theme being the burden of the Old Testament prophets, and was announced by John Baptist, by Christ and His disciples. This announcement was simple and plain: “The kingdom is at hand.” The expression “at hand” here used is significant; indicating not necessarily the immediate future, though the kingdom was definitely offered to that generation; but that the earthly kingdom was the next event which had been clearly announced by the prophets. When the Messiah had been positively rejected by the Jews, He began, alone, without even the sympathy of His disciples, to unfold this forthcoming mystery-age, which had been kept secret in the councils of God, and which was more perfectly revealed to Paul, the first messenger to the Gentiles. Of this revelation of a hitherto unknown age, Paul writes in Eph. 3:1-11: “For this cause I Paul, the prisoner of Jesus Christ for you Gentiles, if ye have heard of the dispensation of the grace of God which is given to me to you-ward: how that by revelation he made known unto me the mystery; (as I wrote afore in few words, whereby, when ye read, ye may understand my knowledge in the mystery of Christ) which in other ages was not made known unto the sons of men, as it is now revealed unto His holy apostles and prophets by the Spirit; that the Gentiles should be fellow-heirs, and of the same body, and partakers of His promise in Christ by the gospel: whereof I was made a minister, according to the gift of the grace of God given unto me by the effectual working of His power. Unto me, who am less than the least of all saints, is this grace given, that I should preach among the Gentiles the unsearchable riches of Christ; and to make all men see what is the fellowship of the mystery, which from the beginning of the world hath been hid in God, who created all things by Jesus Christ: to the intent that now unto the principalities and powers in heavenly places might be known by the church the manifold wisdom of God, according to the eternal purpose which he purposed in Christ Jesus our Lord.”