Flat Earth is the knowledge that removes the FEAR OF THE UNKNOWN. And FEAR is satans best weapon.

there is only ONE, you should fear, and that fear should be you denying his love for you, his child.

Revelation 14:7-8 KJV

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. 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.