The First Epistle of John (1 John) is
a New Testament letter
written by the Apostle John.
It is one of the most practical
and encouraging books in the Bible,
focusing on fellowship with God,
assurance of salvation,
and how true believers should live.
Unlike most New Testament letters, 1 John does not include a traditional greeting or closing. It reads more like a heartfelt sermon or pastoral letter written to believers. John writes with deep pastoral concern to strengthen the faith of his readers and to protect them from false teaching that was threatening the early church.
¶ Author and Date
The author is the Apostle John, one of Jesus’ closest disciples and the writer of the Gospel of John, 2 John, 3 John, and the book of Revelation. Most scholars date 1 John to around A.D. 85–95, near the end of John’s life.
¶ Purpose and Key Themes
John wrote this letter with several clear purposes:
- To promote fellowship (koinonia) with God the Father and with one another.
- To give believers assurance of their salvation.
- To combat false teaching (early forms of Gnosticism) that denied the full humanity and deity of Jesus.
- To emphasize practical Christianity — how genuine faith shows itself in love, obedience, and truth.
Major themes in 1 John include:
- Walking in the light vs. walking in darkness
- Confession of sin and God’s forgiveness
- Love for God and love for one another
- The tests of genuine faith (belief, obedience, and love)
- Assurance of eternal life
- 1 John 1:7 — But if we walk in the light as He is in the light, we have fellowship with one another, and the blood of Jesus Christ His Son cleanses us from all sin.
- 1 John 1:9 — If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.
- 1 John 3:1 — Behold what manner of love the Father has bestowed on us, that we should be called children of God!
- 1 John 4:7-8 — 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.
- 1 John 5:11-13 — And this is the testimony: that God has given us eternal life, and this life is in His Son. He who has the Son has life; he who does not have the Son of God does not have life. These things I have written to you who believe in the name of the Son of God, that you may know that you have eternal life, and that you may continue to believe in the name of the Son of God.
1 John is one of the most practical books in the New Testament. It helps believers in several important ways:
- It gives clear tests to examine whether our faith is genuine.
- It provides strong assurance of salvation for those who believe in Jesus.
- It emphasizes that true faith always results in love and obedience.
- It warns against false teaching and encourages believers to hold fast to the truth about Jesus.
- It deepens our understanding of fellowship — both with God and with other believers.
Because of its clear teaching on assurance and practical Christian living, 1 John is one of the most beloved and frequently studied books in the Bible.