Colossians 1 24
I am happy in my sufferings for you. There are things that Christ must still suffer through his body, the church. I am accepting, in my body, my part of these things that must be suffered.
Compare with other 3 random translations
NLT Colossians 1:24I am glad when I suffer for you in my body, for I am participating in the sufferings of Christ that continue for his body, the church.
LSV Colossians 1:24I now rejoice in my sufferings for you, and fill up the things lacking of the tribulations of the Christ in my flesh for His body, which is the Assembly,
KJV Colossians 1:24Who now rejoice in my sufferings for you, and fill up that which is behind of the afflictions of Christ in my flesh for his body’s sake, which is the church: