Revelation 14:6-7

Revelation 14:6-7. 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, 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.

The old interpreters used to understand these two verses as referring to the great Protestant Reformation. When the old dragon had done his utmost against the Church of God, and the thick darkness of the middle ages rested alike on the Church and the world, then God sent the Reformers, like flying angels, to preach the everlasting gospel, and their special message was, "Worship not saints, and angels, and relics, and crucifixes, but ‘worship him that made heaven, and earth, and the sea, and the fountains of waters.’"