Our union with Christ is affirmed in scripture, particularly in 1 Corinthians 15, where Paul explains our identification with Him as our federal head.
The truth of our union with Christ is underscored in 1 Corinthians 15, where Paul contrasts Adam and Christ as the federal heads of humanity. Just as Adam's sin impacted all who were in him, so too does Christ's righteousness and redemptive work impact all who are united with Him. This is further illustrated in Galatians 2:20, indicating that believers do not live independently—it is Christ who lives in us. This union is pivotal in Reformed theology, emphasizing that our salvation and identity are entirely found in our relationship with Christ as our substitute, who accomplished everything needed for our redemption.
Commentary