William Burkitt on 2 Corinthians 2:3

As if the apostle had said, I gave you a sharp reproof in my former epistle, but it was in much love, and upon a good design; namely, to procure such a reformation of life and manners among you, as might prevent my sorrow when I came unto you; for as your grief is my grief, so my joy is the joy of you all. As the ministers of Christ and their beloved people are one; they rejoice together, and mourn together; their griefs and sorrows are mutual, and their joys and comforts are reciprocal.