The Three Angel's Message
In the book of Revelation, you can find the three angel's message. It is a reminder to fear God, to give Him worship and a call to repent of our sins. It is also a warning against worshiping the beast or his image.
6 And I saw another angel fly in the midst of heaven, having the everlasting gospel to preach unto them that dwell on the earth, and to every nation, and kindred, and tongue, and people,
7 Saying with a loud voice, Fear God, and give glory to him; for the hour of his judgment is come: and worship him that made heaven, and earth, and the sea, and the fountains of waters.
This calls for a choice between truth and error, between following God, or following man.
8 And there followed another angel, saying, Babylon is fallen, is fallen, that great city, because she made all nations drink of the wine of the wrath of her fornication.
Come out of Babylon and keep all of God's commandments - including the fourth.
9 And the third angel followed them, saying with a loud voice, If any man worship the beast and his image, and receive his mark in his forehead, or in his hand,
10 The same shall drink of the wine of the wrath of God, which is poured out without mixture into the cup of his indignation; and he shall be tormented with fire and brimstone in the presence of the holy angels, and in the presence of the Lamb:
When the wrath of God is poured out, all those who have accepted the Mark of the Beast will be tormented with fire and brimstone, but those who choose God will have his seal and will be saved.