Have overcome them (nenikhkate autou). Perfect active indicative of nikaw, calm confidence of final victory as in John 2:13 ; John 16:33 . The reference in autou (them) is to the false prophets in 1 John 4:1 . Because (oti). The reason for the victory lies in God, who abides in them ( 1 John 3:20 1 John 3:24 ; John 14:20 ; John 15:4 ). God is greater than Satan, "he that is in the world" (o en twi kosmwi), the prince of this world ( John 12:31 ; John 14:30 ), the god of this age ( 2 Corinthians 4:4 ), powerful as he seems.