No we don't, but then you know that..
In Christian theology, justification is God's act of removing the guilt and penalty of sin while at the same time making a sinner righteous through Christ's atoning sacrifice. The means of justification is an area of significant difference among Catholicism, Orthodoxy, and Protestantism. Justification is often seen as being the theological fault line that divided Catholic from the Lutheran and Reformed traditions of Protestantism during the Reformation
Yes, you'll have to forgive me, as I'm from a protestant background
However, I think that you do believe this:-
The Catholic Church teaches that the death of Jesus on the Cross is a sacrifice that redeems man
and reconciles man to God.
The moral transformation of the Christian is not the result of merely following Christ's example and teachings, but a supernatural gift merited by the sacrifice of Jesus, for "by one man's obedience many will be made righteous"..
..not a lot different, really.