Union with Christ was integral in the soteriology of the Reformers, and especially that of Calvin. As Marcus Peter Johnson notes in One With Christ, “when Calvin wrote of being united to Christ, he meant that believers are personally joined to the living, incarnate, crucified, resurrected Jesus...this union with Christ, which Calvin described in strikingly graphic and intimate terms, constituted for him the very essence of salvation. To be saved by Christ, Calvin kept insisting, means to be included in the person of Christ. That is what salvation is” (Johnson 12, emphasis original). And it wasn't just a heady doctrine, either; for the Reformers, union with Christ had multifaceted implications for the life of the believer and the life of the Church. Many, myself included, can attest to a fundamental change in personal spirituality as well as approach to life and ministry upon discovering and plunging the depths of the doctrine of union with Christ. I've therefore been delighted by the steady stream of excellent books on the topic in recent years (e.g. R. Letham, J. Billings, M. Johnson, C. Campbell, G. Macaskill, etc), many written from a Reformed perspective. Naturally, I was very eager to read the latest offering from Robert Peterson, Salvation Applied by the Spirit: Union with Christ.
Structurally this book is similar to the volumes in Crossway's Theology in Community series, with a bulk of the book (twenty chapters in this case) providing a sweeping overview of what the entire Bible has to say about the topic. Then a chapter is devoted to a biblical theology of union with Christ, followed by seven chapters treating the doctrine from a systematic perspective.Read More