Economic Unity

...this identification is plainly not ontological, as if he were here obliterating the personal distinction between Christ and the Spirit. Such a view would be a too-flagrant contradiction of his uniform teaching elsewhere. Rather, the oneness expressed has in view a conjunction between Christ (as the last Adam) and the Spirit... Christ (as incarnate) experiences a spiritual qualification and transformation so thorough and an endowment with the Spirit so complete that as a result they can now be equated. This unprecedented possession of the Spirit and the accompanying change in Christ result in a unity so close that not only can it be said simply that the Spirit makes alive, but also that Christ as Spirit makes alive.

 

Richard Gaffin, Resurrection and Redemption: A Study in Paul's Soteriology, pg. 87