1 John

Assures believers of eternal life through faith in Jesus and commands love for God and one another.

Chapter 4

KJV - 1 John 4:2

Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God:

By this, you can tell the Spirit of God: Any spirit that admits that Jesus Christ has come as a real person is from God.

King James Version

Simple English

* work in progress, there will be mistakes