Jn 12:31, Jn 16:33, Rom 8:37, Mt 28:18-19, Jn 17:2, Rom 16:20
Satan is cast out when Jesus, the Christ, comes again. (Rev 12:10, John 12:31)
Rev 12:10 10 And I heard a loud voice saying in heaven, Now is come salvation, and strength, and the kingdom of our God, and the power of his Christ: for the accuser of our brethren is cast down, which accused them before our God day and night.
John 12:31 Now is the judgment of this world: now shall the prince of this world be cast out.
Jesus overcame the world by doing the work of Christ. So we conquered the world. (John 16:33, Romans 8:37, Romans 16:20)
John 16:33 These things I have spoken unto you, that in me ye might have peace. In the world ye shall have tribulation: but be of good cheer; I have overcome the world.
Romans 8:37 Nay, in all these things we are more than conquerors through him that loved us.
Romans 16:20 And the God of peace shall bruise Satan under your feet shortly. The grace of our Lord Jesus Christ be with you. Amen.
After receiving authority from God to rule over all nations, Jesus commanded us to make disciples of all nations. (John 17:2, Matt 28:18-19)
John 17:2 As thou hast given him power over all flesh, that he should give eternal life to as many as thou hast given him.
Matt 28:18 And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth. 19 Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: