Originally posted by DoctorScribbles
Because it is not compatible with the notion of Christ that I understand. Christ died for the sins of the world, including your brother's. Your brother claimed his portion of Christ's suffering as his salvation. When your brother rejected his salvation, did Christ get a refund on his suffering? Would he accept one? How is the suffering that paid for your brother's sins now accounted for?
You're thinking of Christ's death as "paying off" some debt we owe to the Father and, hence, of justification/salvation as being God "covering up" our sins*.
The Catholic view of justification is that of ontological transformation
†. The purpose of Christ's death was to make human nature capable
of accepting God's justifying grace. But how far the process of justification goes (and, in the Catholic view, justification is a process
and not an event
) is up to the person. By rejecting grace, he reverses the process.
* Luther's analogy for this was God throwing a pile of snow on top of manure.
† To modify Luther's analogy, transforming
manure into snow