Because it’s the good news to all men. His messengers are going out gathering his own, those who respond, into his kingdom. It isn’t to bring about the end.
You said the great commission has already been fulfilled and now you say the messengers are still going out. Maybe you could explain this better as I am confused. I do agree that the preaching of the word is not to bring about the end, but that the preaching of the Gospel still goes out into the world until the end.
The end of that age, the Mosaic law, came.
What does the Mosaic law have to do with taking the Gospel out into the world?
That doesn’t matter. The end of the age came and Paul himself wrote in the Bible that the Gospel HAD been preached to all the nations. The Bible even says it was accomplished.
It certainly does matter as we continue in that great commission from the time the Apostles were first sent out to teach others and then they went out and so on and so on. The preaching of the Gospel is for yesterday, today and forever until the door of salvation is closed forever when Christ returns. The only thing that Christ has fulfilled is the righteousness of the Mosaic law.
He has commissioned us to do will never Please show me in the scriptures where Paul wrote this Gospel has already been preached in every nation. There were around seventy nations in Paul's day and now in our time there are 195 all together throughout the whole world so I don't think the preaching of the Gospel has ever stopped.
Romans 10:1 Brethren, my heart's desire and prayer to God for Israel is, that they might be saved. 2 For I bear them record that they have a zeal of God, but not according to knowledge. 3 For they being ignorant of God's righteousness, and going about to establish their own righteousness, have not submitted themselves unto the righteousness of God. 4 For Christ is the end of the law for righteousness to every one that believeth. 5 For Moses describeth the righteousness which is of the law, That the man which doeth those things shall live by them.
Jesus came to fulfill the righteousness of the law as we no longer live by the letter of the law, but now by faith in Christ to all who will believe.
Matthew 5:17 Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil. 18 For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.
Jesus was made the fulfillment of Gods righteousness of the law as He is now our righteousness through faith as we are made righteous through the blood of Christ who has redeemed us from the curse of the law. Notice in vs. 18 that not all the law has been fulfilled yet as we are still under the moral laws Jesus gave to His Church in Matthew 18:15-20; 1 Corinthians Chapters 6-10 and James Chapters 4 and 5. All the law will be fulfilled when Christ returns and we are with Him forever.
There are laws (commandments) of God that were especially written just for the Hebrews pertaining to the rituals of the Temple, sacrifices, festivals, Torah, Kohanim and Levites, the King and the Nazarite. Then there are the existing moral laws (commandments) for all of us to still follow as in prayers and blessings, love and brotherhood. The poor and unfortunate, treatment of the Gentiles, Marriage, divorce and family. Forbidden sexual relations, business practices, employees and servants. Vows, oaths, swearing, Court and Judicial procedures. Injuries and damages, property and property rights, criminal laws. Prophecy, idolatry and all its practices as the moral laws (commandments) keep us in line with the will of God.