Recently, between reading Union with Christ by Rankin Wilbourne and Resurrection and Redemption by Richard Gaffin, the concept of union with Christ as resurrected as the central theme in Paul’s soteriology has been an enriching study. Here’s a quote from Gaffin:
…the notion that the believer has been raised with Christ brings into view all that now characterizes him as a result of having been joined to Christ as resurrected. It means that he has been justified, adopted, sanctified, and glorified with Christ, better, that he has been united with the Christ, who is justified, adopted, sanctified, and glorified, and so by virtue of this (existential) union shares these benefits.
A corollary of this conclusion is that everywhere Paul speaks of the believer’s justification, adoption, sanctification, glorification (or any of the other benefits connected with these), there the more basic, underlying consideration is resurrection with Christ, that is, existential union with Christ as resurrected.