The first Epistle of John (1 John) was written around 90 to 110 CE with the other Epistles of John and is attributed to the apostle John (although not certain). This book is the first John of three and is the 62nd book of the Bible from the King James Version (23rd in the New Testament).
1 John is a moderately sized book in the Bible, which does not contain violence or tales of anyone, but focuses more on proving Jesus' story as reality and convincing people not to sin. It does not say much in the way of Anti-Christ or devil but does mention them, usually with reference to them being evil - or to that effect.
Chapters in 1 John
Chapter One The first chapter of this book tells of how we need to forgive our sins and walk in a path of light. Also, the line 1:6 states that if we lie, then we can be considered liars, which for obvious reasons is false.
Chapter Two The second Chapter tells of what we should do to be with God. It tells of things like loving our brothers, not loving any aspect of the world and how to identify the Anti-Christs. 2:15 tells people not to love the world or anything in the world as this is sinning, and God's love would not be in us. apparently we aren't allowed to enjoy the planet all-loving God made for us...
Chapter Three Chapter three contains references to both the Devil and God with some slightly contradicting consequences, and leaves another message, much like the first chapters one, about loving your brothers, but this time in a more first person style of writing. The message states at one point that anyone who does not love his brother is a murderer and will not go to Heaven (3:15). The Third chapter also tells readers that they will receive anything they ask for, if they believe and worship him.
Chapter Four The fourth Chapter explains how to identify a spirit from the true god, but its reasoning is somewhat flawed. It also explains how to identify 'spirits of truth and falsehood' which would seem to be somewhat basic and flawed as well. 4:7 states that if you know God then you have the ability to love, which means that atheists cannot experience love according to the bible, it repeats numerous times that God is love and tries to reinforce Jesus' sacrifice from this reasoning. Chapter four also mentions the notion of loving your brother for the reward of heaven, which as previously stated, contradicts various other areas of scripture.
Chapter Five Chapter five follows the relative theme of Chapter four but in a slightly different way. It reinforces Jesus' sacrifice with 'proof' being that blood, water and spirit testify to the stories authenticity. This chapter also brings up the message getting anything you pray for, which was adressed previously. the chapter ends with a reference to remembering God and not sinning.
Contradictions 2:9 states that anyone who hates his brother is not in the light, a reference to not being with God. This contradicts other parts of scripture stating that you have to hate your family to be a disciple of Jesus. To get into heaven we need to be a disciple of jesus. Are we supposed to hate or love our brother? 3:22 states that we can get anything we ask for from God. This contradicts other areas in the Bible and common belief as well.
The Gospel of John, the Epistles of John and Revelation are all attributed to The apostle John in Christian Tradition but its unlikely he wrote all of them due to grammatical differences and writing styles. The three Epistles of John, of which 1 John is from, and The Gospel of John are thought to be authored by the Apostle John whilst revelation is thought to be written by John of Patmos, who is deemed a different person entirely.
This book has references to lying throughout it and seems to be trying to place the blame on people for lying and saying that people do not know god unless we repent for this sin. It has less of a violent theme to it and not much insulting either.