The books of 1 2 & 3 John, are letters written by the Apostle John, emphasising the importance of love, truth, and fellowship with God. John encourages the relatively new Christian movement of believers – the Church - to walk in the light, love one another, and reject false teachings. He highlights the assurance of eternal life through faith in Jesus Christ and the need for believers to live righteously, reflecting God's love in their actions.

In 2 John, John writes a brief letter to a specific church congregation, urging them to continue walking in truth and love. Again, he warns against false teachers who deny the incarnation of Jesus Christ and encourages the recipients to remain faithful to the teachings of Christ.

3 John is a personal letter from the Apostle John to his friend Gaius. John commends Gaius for his faithfulness and hospitality towards traveling missionaries. He contrasts Gaius's positive example with the negative behavior of Diotrephes, who refuses to welcome the missionaries and seeks to undermine John's authority.

The book of Jude, written by Jude, the brother of James (and half brother of Jesus), warns against false teachers who have infiltrated the Christian community. Jude urges believers to contend for the faith and remain steadfast in their commitment to Christ. He highlights the importance of building oneself up in faith, praying in the Holy Spirit, and showing mercy to those who doubt. Jude concludes with a beautiful blessing, praising God for His ability to keep believers from falling and to present them blameless before His presence.