{Have overcome them} (
enik(886b)ate autous). Perfect active
indicative of 
ika(935c), calm confidence of final victory as in
 2:13  Joh 16:33 . The reference in autous (them) is to the
false prophets in  4:1 . {Because} (hoti). The reason for the
victory lies in God, who abides in them ( 3:20,24  Joh 14:20  15:4f. ). God is greater than Satan, "he that is in the world"
(ho en t(9369) kosm(9369)), the prince of this world ( Joh 12:31  14:30 ), the god of this age ( 2Co 4:4 ), powerful as he seems.