I will begin with the part with which I very much agree, in which Mike Horton warns against calling “sanctification” a cooperation.
Horton: “It is inappropriate to import the monergism-synergism
antithesis (typically belonging to the debate over the new birth and
justification) into sanctification. It is better simply to say that we are working out that salvation that has Christ has already won for us and given to us by his Spirit through the gospel. Though in
sanctification (unlike justification) faith is active in good works,
the gospel is always the ground and the Spirit is always the source of our sanctification as well as our justification.”
Mark McCulley: The Holy Spirit does give us what Christ has already won. But we also need to say that the Son gives us the Holy Spirt, and that the Son is given to us by legal imputation. Galatians 4:6– because you are sons, God has sent the Spirit into your hearts.”
Of course this raises many questions about order and the word “union” and Horton has done a good job of borrowing from Bruce McCormack on the priority of imputation as a performative act. (See both his book on Covenant Union and his essay in Tributes to Calvin).
I know the Westminster Confession uses “applied by the Spirit”
language but we need to account for the order in Galatians 3:13-14.
Redemption/ justification is the basis for the promise of the Spirit,
the blessing of Abraham. As Ephesians 4:8 quotes Psalm 68: “when he
ascended on high, he gave gifts to men.” Every reference to “baptism
with the Spirit” (including I Cor 12:13) has Christ as the one who
gives the Spirit, not the Spirit as the one who gives us Christ.
Effectual calling by God the Father does not assume that it’s the Spirit who includes us into Christ.
It’s a reduction (not the entire truth) to say tha the Holy Spirit gives us the salvation which Christ won. Even though I agree that there is no imputation and calling apart from the Spirit, I worry about the leaving out forensic imputation or making the legal only one of the results of some “more basic” union.
The thing I would most fundamentally question in Horton’s paragraph
above is the conclusion—“the Spirit is always the the source of our
sanctification as well as our justification.” One, the Father is
forgotten. Two, in what sense is the Spirit the source of our
justification? In the sense that Christ did His work by the Spirit? In the sense that the Spirit gives us the faith which has as its object what Christ won for the elect?
We need to make sure that we keep saying that Christ’s righteousness is not what the Spirit does in us. This is why I don’t think we should even talk about a “twofold righteousness” or an “imparted righteousness”. In any case, we need to make a distinction (not identify) the work of Christ outside us and the work of the Spirit in us.
Three, we need to define “sanctification” and make a distinction
between our traditional use of the word and the Bible use of the word. The Bible has different senses of “sanctification”, both by the Spirit (II Thess 2:13) and “set apart and perfected by the blood” (Hebrews 10). David Petersen’s book Possessed by God is a good place to start to think about this.
Of course, in our common language, when we say ‘sanctification”, we tend not to be talking about Christ’s death or about the Spirit causing us to hear the gospel. We tend to think of the new birth as creating in us a new disposition which causes us to gradually get better.
Horton in his good book on covenant union has a very good discussion
of the problems with traditional accounts of “regeneration”, and I
know that none of us can talk about everything at one time. But my
specific point is to ask how the Spirit is the source of
“sanctification”. If we are talking about “sanctification by the
blood” (Hebrews 10) then it is very right to notice the parallel to
Christ’s death as the source of justification.
But if we are talking about the Spirit causing us to understand and believe the gospel, then we cannot identify the source of justification as the Holy Spirit.
The gospel is about the law, because the gospel tells us how Christ
satisfied the law for the elect. The gospel demands a faith that
repents from the old life of trusting ourselves (even with grace and help) to satisfy the law. To hear the gospel is to turn from the sin of trusting ourselves (with grace and help) to ever become acceptable to God. We learn to take sides against ourselves. It is Christ’s death which not only justifies us but also sanctifies us.
We believe and we repent, and the Holy Spirit causes us to do
both, but these things that the Spirit works in us are not our righteousness. The Holy Spirit’s work in us is not the source of either our justification nor our sanctification.
While we are still sinners, we are already sanctified.
Horton’s remarks can be found at: http://www.whitehorseinn.org/blog/2012/03/23/sanctified-by-grace/