Life-giving Spirit
At his resurrection the personal mode of Jesus' existence as the last Adam was so decisively transformed by the Holy Spirit that Paul says he has become life-giving Spirit. The Spirit, who raised him up as the firstfruits, indwells him so completely and in such a fashion that in their functioning he is the Spirit who will be instrumental in the resurrection of the full harvest. Further, (a) the life-giving activity predicated of the resurrected Christ, is not predicated directly; the Spirit is an absolutely indispensable factor. Only by virtue of the functional identity of the Spirit and Christ, effected redemptive-historically in his resurrection, is Christ the communicator of life. No principle in Paul's soteriology is more fundamental. (b) The change in Christ's person at his resurrection is as real as and commensurate with the transformation to be experienced by the rest of the harvest.
Richard Gaffin. Resurrection and Redemption (Philippsburg, NJ: Baker Book House, 1978), 89