Theme of 1 John

First John calls readers back to the three basics of Christian life: true doctrine, obedient living, and faithful devotion. Because “God is light” (1:5), Christ’s followers overcome wicked people who oppose them. God’s Son lives in and among them. He is greater than the spirit of “the antichrist” now in the world (4:3–4). Those who believe in the Son of God have assurance of eternal life (5:13).

Theme of 2 John

The focus of 2 John is living in God’s love according to the truth of Jesus Christ. This love extends not only to God but to others as well. It is also wise; it does not “go on ahead” of biblical revelation (v. 9). It does not aid enemies of the gospel (vv. 10–11). Instead, Christ’s followers “walk according to his commandments” (v. 6). Through faith they “win a full reward” (v. 8).

Theme of 3 John

The theme of 3 John is faithfulness despite opposition. The man who received the letter, Gaius, faces a troublemaker named Diotrephes. By “walking in the truth” (vv. 3, 4), Christians can live out the message that John teaches in all his letters.