The Remnant must preach the Truth.
The remnant church of the last days will carry God's final warning message to all the world.
That message will include (a) the judgment hour is come, (b) true Sabbath worship, (c) the fall of spiritual Babylon, and (d) the mark of the beast.
Revelation 12:11, "And they overcame him by the blood of the Lamb and by the word of their testimony, and they did not love their lives to the death."
Matthew 24:14, "And this gospel of the kingdom will be preached in all the world as a witness to all the nations, and then the end will come."