We are telling you about what we ourselves have actually seen and heard, so that you may have fellowship with us. And our fellowship is with the Father and with his Son, Jesus Christ.
We are writing these things so that our joy will be complete.
References for 1 John 1:4
This is the message he has given us to announce to you: God is light and there is no darkness in him at all.
So we are lying if we say we have fellowship with God but go on living in spiritual darkness. We are not living in the truth.