I want you to know how glad I am that it's me sitting here in this jail and not you. There's a lot of suffering to be entered into in this world - the kind of suffering Christ takes on. I welcome the chance to take my share in the church's part of that suffering.
Now I rejoice in my sufferings for you, and I am completing in my flesh what is lacking in Christ's afflictions for His body, that is, the church.
Colossians 1:24 In-Context
But now he has reconciled you by Christ’s physical body through death to present you holy in his sight, without blemish and free from accusation—
if you continue in your faith, established and firm, and do not move from the hope held out in the gospel. This is the gospel that you heard and that has been proclaimed to every creature under heaven, and of which I, Paul, have become a servant.
Now I rejoice in what I am suffering for you, and I fill up in my flesh what is still lacking in regard to Christ’s afflictions, for the sake of his body, which is the church.
I have become its servant by the commission God gave me to present to you the word of God in its fullness—
the mystery that has been kept hidden for ages and generations, but is now disclosed to the Lord’s people.