The Apostle says: I make up in my flesh what is lacking to the sufferings of Christ (Col. 1:24). I make up, he tells us, not what is lacking to my sufferings, but what is lacking to the sufferings of Christ; not in Christs flesh, but in mine. not in Christ's flesh, but in mine. Christ is still suffering, not in His own flesh which He took with Him into heaven, but in my flesh, which is still suffering on earth.

St. Augustine of Hippo