The remarks already made on the parable of the tares preclude the need of much argument here. Only, it is an exaggeration and mistake if people have taught such that the millennium is a perfect state, or that there can be such till eternity. Isa. 65 is clear that sin and death are still possible within its course; and Rev. 20:7-107And when the thousand years are expired, Satan shall be loosed out of his prison, 8And shall go out to deceive the nations which are in the four quarters of the earth, Gog and Magog, to gather them together to battle: the number of whom is as the sand of the sea. 9And they went up on the breadth of the earth, and compassed the camp of the saints about, and the beloved city: and fire came down from God out of heaven, and devoured them. 10And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever. (Revelation 20:7‑10) demonstrates, that after its expiration there will be a vast muster of the distant nations, Gog and Magog, under the guidance of Satan, once more deceiving men. These have been all born within the thousand years, and may have rendered a feigned obedience throughout; but not being renewed, they fall under Satan's snares as soon as he is loosed and goes out to deceive them. The reign of the Lord in visible glory over the earth will not change the heart nor deliver from temptation when the enemy appears.
But this has nothing in common with the wheat field, among which tares were sown. Tares do not mean men as merely evil by nature, but the result of Satan's special sowing in Christendom—heretics and other corrupt persons mingled with the confessors of Christ. In that field the servants are forbidden to take in hand the extermination of the tares from among the wheat. Care for the true, not judgment of the false, is their business. Others—the angels—will deal with the children of the wicked one in the time of harvest (i.e., in the completion of the age). Patient grace becomes the servants, not earthly judgment, which in their hands might work, as indeed it always has wrought, mischief to the children of the kingdom.
At the present there reigns grace; in the millennium righteousness will reign; in eternity righteousness will dwell. The thousand years will not be without evil, but the earth will be happy and perfectly governed, till Satan, during the short space that succeeds, is allowed to marshal the distant nations against the camp of the saints and the beloved city (earthly Jerusalem); but those nations who fall under Satan's last deceit are never called “tares.” They were no produce of Satan's seed, for they existed in an unregenerate state before he was let loose. It is not the fact that any intelligent premillenialists describes the millennium “just as other people do” (p. 310); for post-millennialism by extending such a parable as that of the tares to that day, simply destroys the millennium. The clearance of tares from the kingdom of the Son of man will not hinder the birth of men throughout the thousand years, multitudes of whom will be unrenewed, and thus exposed to the enemy at the close. The popular system is infidelity as to the millennium; it denies the introduction of a new age after this age, and the co-existence and display of the kingdom of God in both its parts—heavenly and earthly. The end of the age is not the end of the world, but the completion of the present course of time, when, the Lord will not have His servants exercise judgment by rooting the evil out of the field. In the end, judgment will be applied to purge out all scandals for the reign of Christ and those who are glorified along with Him. The making disciples of all nations cannot contradict the Lord's word, that the gospel of the kingdom shall be preached in all the world for a witness unto all nations. It is the grossest begging of the question to say there is no millennium to come after this. Preaching for a witness suits the actual time, but not the millennium. Jehovah shall be king over all the earth; in that day there shall be one Jehovah and His name one.