“We proclaim to you 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 you may fully share our joy.”
1 John 1:3-4
The joy we feel comes by knowing we have found a new brother and sister in Christ. The fact that we can get he is in the center is affirmed and established through the Gospel.