Before Christ's coming, the nations inhabiting the earth could be divided into Jews, who worshiped the true God and therefore constituted the chosen flock, and pagans, who worshiped idols. Jesus' words that there will be one flock and one Shepherd prove that, henceforth, the Jews cease to be the exclusive chosen flock of God.
They prove that pagans, sheep not of this fold, will also be drawn into this chosen flock. In this way one flock of many peoples will be formed under the headship of one Shepherd, Christ. This thought, contained in the cited words of Jesus Christ, is clear and raises no objection.
But one may ask whether this thought can be developed more broadly. Should one think that, in time, all humanity without exception, containing all the nations of the earth, will enter this one flock?
Will there be no other flocks outside this flock? Consequently, will all people acknowledge Jesus Christ as their Shepherd?
The answer to this question must be sought in the Gospel, in the sayings of Jesus Christ. Speaking of the end of the world and His coming second advent, Christ said: "And this gospel of the Kingdom will be preached throughout the whole world, as a testimony to all nations. And then the end will come" (Mt 24:14, cf. Mk 13:10).
This saying of Jesus Christ leads to the conclusion that, before the end of the world, the Gospel will be preached to all nations inhabiting the earth. That is, all will be given the possibility of knowing the true God and His will.
But from these words of Jesus, according to some interpreters, one cannot conclude whether they will all love God and all do His will. Nor can one conclude whether all will unite into one harmonious family, animated by love for God and one another.
The coming division at the final Judgment into righteous and sinners includes not only all who are raised for that purpose, but also those who live until that time. This leads these interpreters to think that, even at the end of the world, humanity will not constitute one flock whose sheep obey the voice of their Shepherd.
One cannot, however, agree with such an opinion. The thought of one flock and one Shepherd was placed, so to speak, into human hearts at their very creation. It was upheld in the consciousness of the best representatives of the human race throughout the whole very long period of its existence.
The thought that God Himself reigns over men, whose will they must fulfill as an unconditionally binding law, illumines the whole history of the Old Testament. The fundamental laws of God, love God, love your neighbor, and labor, were given already to the first people.
In them is all God's righteousness, and by them all mutual relations among people were to be determined. If people had truly been governed by these laws, they would long ago have formed one flock with one Shepherd.
They would have formed that earthly paradise, that Kingdom of God, which constitutes the purpose of humanity's earthly life. But people were created as free beings. They could submit to God's will expressed in these laws, and they could also resist it.
Having understood the freedom given to them as resistance to every other will, and therefore to God's will, people unknowingly began blindly to fulfill another will. It was an evil will, setting them against one another, dividing them, and thereby preventing them from joining into one harmonious flock with one Shepherd.
Not noticing this submission, man thought that he was doing his own will and doing what he himself wanted. Therefore he began to regard his desires as the highest law for himself, and their satisfaction as the meaning of his life.
Many years passed in this way, and people fell morally lower and lower. Having forgotten the will of God expressed in His eternal and unchanging laws, they did not understand the goal of human life and saw no meaning in it.
The best representatives of paganism reached despair and considered that man's only happiness lay in the possibility of ending his aimless and meaningless life by suicide. Yet almost all nations inhabiting the earth possessed a dim recollection of that blessed time when people lived in happiness, lacking nothing.
There was grief over the loss of this blessedness and dreams of the coming golden age, of the return of the lost paradise. All this led people whose souls were not sunk in the trifles of everyday life to understand that life could not go on this way.
They understood that a Man must appear who would renew the fallen world. They awaited this Man from the East. Inspired by God, the Hebrew prophets proclaimed the swift coming of this blessed future.
The prophet Isaiah, thundering in fiery speeches against the lawlessness of his contemporaries, nevertheless consoled them that the blessed time would come. Then "the wolf shall dwell with the lamb, and the leopard shall lie down with the kid.
The calf, the young lion, and the ox shall be together, and a little child shall lead them. The infant shall play over the hole of the asp, and the child shall stretch his hand over the den of the serpent. They shall not do evil or harm on My holy mountain" (Is 11:1-10).
The prophet Micah, speaking of the same blessed time, foretold that when people "beat their swords into plowshares and their spears into pruning hooks, nation shall not lift up sword against nation, neither shall they learn war anymore.
But each shall sit under his vine and under his fig tree, and no one shall make them afraid" (Mic 4:1-4). In general, the best people of that time believed that happiness would be possible only when swords rusted and plows shone.
It would be possible when granaries were full, and hospitals and prisons empty. It would be possible when the steps of churches and schools were worn down, and the road to the courts was overgrown with grass.
And then Christ came with the good news that man is immortal. His brief earthly life is a preparation for eternal Life. For this eternal Life people will be raised, and after the final Judgment over them, some will be blessed and others will suffer.
One can be counted worthy of the blessedness of eternal Life only by fulfilling the will of God. God requires of people love for Him, the Creator, and for all people. Man's good lies not in oppressing his neighbors, but in constant help to them.
It lies in love even toward those whom we mistakenly consider our enemies. There must be no enemies. All must be brothers and friends.
Bringing such news, Christ knew that He had "not brought peace to the earth, but a sword." He knew that His teaching would produce fearful divisions among people, even among members of one and the same family.
Yet at the same time, in His farewell discourse, He told His apostles not to be troubled by this, because victory was assured to Him: "Be of good cheer. I have overcome the world" (Jn 16:33).
Earlier He had said that all the nations of the earth would hear His voice, that is, His teaching. Then that blessed time would come of which the prophets proclaimed and the pagans dreamed. Then there would be one flock and one Shepherd.
Can one doubt the truth of what the Lord said about one flock with one Shepherd, after He said that He had overcome the world? In what else could this victory be expressed, if not in the uniting of all people inhabiting the earth into one flock?
It is their uniting into one Kingdom of God, in which God Himself reigns, and which Christ came to restore. Of course, such a union of people into one Kingdom of God will take place very slowly. But it is already taking place.
According to the Lord's word, it will certainly be accomplished. Much tares still grow now in Christ's field. Yet, through the united efforts of all true disciples of Christ, these tares will become fewer and fewer.
Much land is still not occupied by this field. Yet the word of God is now sown even where there are no favorable conditions, and it sprouts. Let no one say that the tares will choke the wheat.
Although at times the tares may grow strongly and oppress the wheat by their growth, we must not forget that the word of God, like a mustard seed, possesses wondrous power to grow into a luxuriant tree. Under its branches there will be no place for tares.
Certainly, if we preach that people will never unite into one harmonious family loving God and one another, then by this we will delay the return to humanity of the lost paradise. We will delay it, but we will not prevent the fulfillment of God's will and of what Christ said.
Let us not doubt the truth of the Lord's words. Let us try to warm our own hearts and the hearts of our neighbors with love, so that the God of peace and love may reign in us. Let us, according to our strength, broaden the borders of the Kingdom of God.
Let us all unite in prayer and beseech the merciful Creator: may the spirit of malice, enmity, and hatred of mankind, which now reaps an abundant harvest, fall silent. May our hearts be kindled with love for Him, the heavenly Father, and for one another.
May He help us recognize our spiritual poverty, our moral impotence, and our nothingness in comparison with the perfection toward which we must strive. May He grant us strength to broaden the borders of His Kingdom.
May we all be one, and may we be one with Him. May we be one flock with one Shepherd.