Are you saying that Christ's work on the cross isn't sufficient all by itself?
Interesting. Please explain the thief on the cross.
“Are you saying that Christ’s work on the cross isn’t sufficient all by itself?”
St. Paul to the Colossians: Chapter 1 Verse 24 - Who (Paul referring to himself) now rejoice in my sufferings for you, and fill up those things that are wanting of the sufferings of Christ, in my flesh, for his body, the Church.”
Christ allowed the thief’s repentance to be sufficient and so the time the thief spent on the cross became his full penance because Christ said so - the thief had still suffered during his time on his cross.