Look to yourselves, that you may not lose what you have worked for, but may win a full reward.

βλέπετε ἑαυτούς, ἵνα μὴ ἀπολέσητε ἃ εἰργασάμεθα ἀλλὰ μισθὸν πλήρη ἀπολάβητε.

Later Commentaries

George Leo Haydock (1774-1849)

Haydock Catholic Bible Commentary: 2 John

We here see the reward for adhering to the Catholic faith, and the condemnation for revolting from the received truth. The apostles, and their lawful successors in the ministry, determine the true doctrine in points which innovators call into controversy, which being once done and declared to the faithful, they need no other mark to know a false teacher, but that he cometh with another doctrine than that which has been delivered.