Mark Shea explains unintentionally why attention to the forensic aspect of salvation is so important and why efforts to downplay that importance by elevating sanctification need great carefulness:
What then does the word “merit” mean in 1990s terminology? In the words of one of the foremost Catholic theologians of the 20th Century (Hans Urs Von Balthasar), the best modern equivalent for what the medieval and renaissance Church meant by merit is “fruitfulness.” (A term Evangelicals are abundantly familiar with from John 15 and other Scriptures.) Now “fruitfulness” (as all Evangelicals know) refers to the outworking of God’s grace in our lives, both in changing us into the image of Christ and in “bearing fruit for the Kingdom” by, say, winning hearts for Christ, feeding the hungry, caring for the needy, etc. None of this (as I learned long ago in Evangelicaldom) is “works salvation” but is simply the way in which we participate in the divine life, go “from glory to glory” and cooperate with the sanctifying power of Christ. With that in mind, let’s now look at the Trent quote above and see what we can make of it.
The Council says that “the gifts of God are also the good merits of him justified.” Is this saying “Salvation means God does half and we do half?” No. It is saying something far more radical. It is saying that God does it all and we do it all. Following Paul (who urged the Philippians to “work our your salvation with fear and trembling, for it is God who works in you to will and to act according to his good purpose”), the Council asserts that the fruit borne by the believer is real fruit which is really and truly given by God and therefore really and truly a part of the believer’s life. Instead of seeing salvation as “snow on a dunghill” (a mere legal decree of righteousness which gets us to heaven yet which leaves us unchanged in our inner being), the Council sees salvation as a process which really changes us in our inner being and conforms us to the image of Christ.
If the Obedience Boys, then, are going to talk about what we do in sanctification or encourage us to look to our works for some measure of assurance, they should understand that those who still protest (read Protestants) don’t want a return to Trent:
Trent, then, insists that salvation is incarnational. Just as the Word is made flesh, so (in us) grace is enfleshed in real, solid, tangible change and the fruits of love, joy, peace, patience, kindness, goodness, faithfulness, gentleness and self-control (Galatians 5:22-23). For the very essence of the saving gospel is that it is to really bear fruit in our lives and become kneaded into our full humanity. Thus, what the Council means is that our good fruit (or merits in 16th Century speak) really are ours as well as God’s great gift. When we, under grace, do a good thing it is really we who do it… because God willed that we do it. (A truth my Evangelical friends believe as much as Trent–when they are not arguing against Rome.)
I don’t know about you (or what tune you use), but I’m not sure how those who put sanctification on a par with justification sing “Rock of Ages” in a good conscience:
Nothing in my hand I bring,
simply to the cross I cling;
naked, come to thee for dress;
helpless, look to thee for grace;
foul, I to the fountain fly;
wash me, Savior, or I die.
Old Life 