1. "If anyone sins, we have an Advocate with the Father, Jesus Christ the righteous” (1 Jo. 2:1).
2. “For this purpose the Son of God was manifested, that He might destroy the works of the devil” (1 Jo. 3:8).
3. “He who does not love does not know God, for God is love” (1 Jo. 4:8).
4. "If we ask anything according to God’s will, He hears us” (1 Jo. 5:14).
5. “Many deceivers have gone out into the world who do not confess Jesus Christ as coming in the flesh” (2 Jo. 1:7).

In 1, 2, & 3 John, God is glorifying Himself through our fellowship with Himself and believers with one another, so that He might demonstrate His superior goodness in the salvation sinners, the damnation of the wicked, and for the preservation of His people, for His eternal glory, and their eternal joy.

The author is the apostle John, “the disciple whom Jesus loved,” and one of the “sons of thunder” whom Jesus charged with the care of His mother Mary while on the cross. He also wrote the Gospel of John and the book of Revelation.

“Beloved, let us love one another, for love is of God; and everyone who loves is born of God and knows God. He who does not love does not know God, for God is love. In this the love of God was manifested toward us, that God has sent His only begotten Son into the world, that we might live through Him. In this is love, not that we loved God, but that He loved us and sent His Son to be the propitiation for our sins. Beloved, if God so loved us, we also ought to love one another.”

1 John 4:7–11

“And now I plead with you, lady, not as though I wrote a new commandment to you, but that which we have had from the beginning: that we love one another. This is love, that we walk according to His commandments. This is the commandment, that as you have heard from the beginning, you should walk in it.”

2 John 5–6

“I wrote to the church, but Diotrephes, who loves to have the preeminence among them, does not receive us. Therefore, if I come, I will call to mind his deeds which he does, prating against us with malicious words. And not content with that, he himself does not receive the brethren, and forbids those who wish to, putting them out of the church. “Beloved, do not imitate what is evil, but what is good. He who does good is of God, but he who does evil has not seen God.”

3 John 9–11

1. If we profess to know God, then we should keep His commandments.
2. If we love God, then we should love our brother also.
3. We should not believe those who claim to be speaking God’s truth if they deny that Jesus Christ has come in the flesh.

1 John

1. The Incarnation (1 Jo. 1:1–4)
2. Fellowship with God and One Another (1 Jo. 1:5–2:17)
3. False Teachers (1 Jo. 2:18–27)
4. Eschatological Hope (1 Jo. 2:28–3:10)
5. Loving the Brethren (1 Jo. 3:11–24)
6. False Spirits (1 Jo. 4:1–6)
7. God is Love (1 Jo. 4:7–21)
8. Faith that Overcomes (1 Jo. 5:1–12)
9. Confidence in Prayer (1 Jo. 5:13–21)

2 John

1. Salutation (2 Jo. 1:1–3)
2. Walking in Love Is Obeying His Commandments (2 Jo. 1:4–6)
3. Beware of Antichrist Deceivers (2 Jo. 1:7–11)
4. Farewell Message (2 Jo. 1:12–13)

3 John

1. Greeting (3 Jo. 1:1)
2. Joy in Children Walking in Truth (3 Jo. 1:2–4)
3. Gaius Commended for Faithfulness and Hospitality (3 Jo. 1:5–8)
4. Diotrephes, the Divisive Man Who Does Not See God (3 Jo. 1:9–11)
5. Imitate Demetrius (3 Jo. 1:12)
6. Farewell Message (3 Jo. 1:13)