1 John 1:3-4

What we have seen and [ourselves] heard, we are also telling you, so that you too may realize and enjoy fellowship as partners and partakers with us. And [this] fellowship that we have [which is a distinguishing mark of Christians] is with the Father and with His Son Jesus Christ (the Messiah). And we are now writing these things to you so that our joy [in seeing you included] may be full [and your joy may be complete].