2-е Иоанна 1:9

The loss (Jo2 1:8) meant is here explained: the not having God, which results from abiding not in the doctrine of Christ. transgresseth--The oldest manuscripts and versions read, "Every one who takes the lead"; literally, "goes," or "leads on before"; compare Joh 10:4, "He goeth before them" (not the same Greek). Compare Jo3 1:9, "Loveth to have the pre-eminence." hath not God-- (Jo1 2:23; Jo1 5:15). The second "of Christ" is omitted in the oldest manuscripts, but is understood in the sense. He--emphatical: He and He alone.

The apostle here salutes an honourable matron and her children (Jo2 1:1-3). Recommends to them faith and love (Jo2 1:5, Jo2 1:6). Warns them of deceivers (Jo2 1:7), and to take heed to themselves (Jo2 1:8). Teaches how to treat those who bring not the doctrine of Christ (Jo2 1:10, Jo2 1:11). And, referring other things to personal discourse, concludes the epistle (Jo2 1:12, Jo2 1:13).

1:9 Anyone who wanders away from this teaching (literally everyone going beyond and not remaining in the teaching): To go beyond is to contradict the apostolic teachings about Jesus Christ and believe things about Jesus that were not taught by the apostles. This is a warning to the church not to listen to the false teachers.