The believer's union in Christ is the all-embracive reality
of his redemption. This doctrine is the single, unifying
theme of our relationship with God in and through Christ.
Scripture bears copious testimony in this respect. For
example, believers are elected unto salvation by God the
Father in eternity past in Christ, Eph 1:3,4. In time
we are united with Him in His death and resurrection,
Rom 6:2-11.