Verse 3
And I wrote this same unto you - This I particularly marked in my first epistle to you; earnestly desiring your reformation, lest, if I came before this had taken place, I must have come with a rod, and have inflicted punishment on the transgressors. See 1Cor 5:1-13.
My joy is the joy of you all - I know that ye wish my comfort as much as I wish yours.