The union of Christ is mentioned
and referenced throughout New Testament scripture. It is a phrase that many have
a hard time defining. Regarding the subject, Paul himself said, “This is a
profound mystery.” (Eph. 5:32) Basically, the union that the believer has with
Christ pertains to the entirety of salvation. According to John Murray, “the various
other doctrines are simply subparts.” (i.e regeneration, justification, and
sanctification.) Paul states hundreds of different phrases implying the unity
that the believer has with Christ. He uses phrases like: “In Christ”, “with
Christ”, and “In Him” (along with others) to represent the connection and unity
between the believer and Jesus.

The unity that we share with Christ
is one of the most crucial aspects regarding the doctrine of salvation. As
Murray stated, “it is an inclusive term for the whole of salvation.” Millard J.
Erickson explains the…