As the rays of the sun penetrate to the remotest corners of the globe, so God designs that the light of the gospel shall extend to every soul upon the earth.... At this time, when the enemy is working as never before to engross the minds of men and women, we should be laboring with increasing activity. Diligently, disinterestedly, we are to proclaim the last message of mercy in the cities—in the highways and byways. All classes are to be reached. As we labor we shall meet with different nationalities. None are to be passed by unwarned. The Lord Jesus was the gift of God to the entire world—not to the higher classes alone, and not to one nationality, to the exclusion of others. His saving grace encircles the world. Whosoever will, may drink of the water of life. A world is waiting to hear the message of present truth....
The kingdom of grace is now being established as day by day hearts that have been full of sin and rebellion yield to the sovereignty of His love. But the full establishment of the kingdom of His glory will not take place till the second coming of Christ to this world. “The kingdom and dominion, and the greatness of the kingdom under the whole heaven” is to “be given to the people of the saints of the most High” (Daniel 7:27)....
The heavenly gates are again to be lifted up, and with ten thousand times ten thousand and thousands of thousands of holy ones, our Saviour will come forth as “King of kings, and Lord of lords” (1 Timothy 6:15). Jehovah Immanuel “shall be king over all the earth: in that day shall there be one Lord, and his name one” (Zechariah 14:9). “The tabernacle of God is with men, and he shall dwell with them, ... and be their God” (Revelation 21:3).
But before that coming, Jesus said, “This gospel of the kingdom shall be preached in all the world for a witness unto all nations.” His kingdom will not come until the good tidings of His grace shall have been carried to all the earth. HP 340
After completing the Lord’s Prayer, Jesus added: “If ye forgive men their trespasses, your heavenly Father will also forgive you: but if ye forgive not men their trespasses, neither will your Father forgive your trespasses.” (Matthew 6:14-15). Pr 239-240
"And this gospel of the kingdom shall be preached in all the world for a witness unto all nations; and then shall the end come." Matthew 24:14 (King James Version)