Samuel Renihan on New Covenant Union
In Reformed Baptist Covenant Theology and Biblical Theology (found in the volume Recovering a Covenantal Heritage), Micah and Samuel Renihan explain New Covenant union with Christ.
Jesus Christ has been and always will be the federal head of the covenant of grace/New Covenant. To be federally united to him you must be 1) promised to him outside of time in the covenant of redemption and 2) brought into union with him in time by the Holy Spirit.
The Son was the one elected by the Father to win the redemption of the elect. All of this is accomplished in the New Covenant, which is the historical climax of the covenant of grace. To be in the covenant of grace/New Covenant, you must be united to Christ, its federal head.17
Since the covenant of grace is the retro-active application of the New Covenant, if we posit that Christ is the mediator…
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