Purpose of 1 John 1

In verses 3-4, John writes, "We are telling you what we have seen and heard, so that you may share in this life with us. And we share in it with the Father and with his Son Jesus Christ. We are writing to tell you these things, because this makes us truly happy."

John's purpose is always to share his knowledge of God's salvation with others, so that they may share in the truth.

This should be my purpose, too. But sometimes I get sidetracked, more focused on sounding reasonable than on being open and honest about my faith.