John wrote his letters sometime between the 60's and the 90's of

the first century AD

Introduction - I John 1:1-4

Living in the Light - I John 1:5-2:6

A New Command - I John 2:7-29

Living as Children of God - I John 3:1-10

Love One Another - I John 3:11-24

Discerning False Prophets - I John 4:1-6