Which phrase about the church is unique only to Paul?
The phrase unique to Paul is “the church, which is his body,” also expressed as “the body of Christ, which is the church.” This terminology distinguishes the church as Christ’s body, not Israel, and marks a 180-degree change from Christ baptizing Jews into the Spirit’s power.
Les explains that this term about the church is unique only to Paul, and that it makes all the difference. Earlier, as Acts begins, Jesus is the baptizer who baptizes the Jew into the power of the Holy Spirit. But Paul completely flips that: now the Holy Spirit becomes the baptizer, baptizing predominantly, not exclusively, Gentiles into the body of Christ. This is a complete 180-degree turn in operation after Israel rejected and God turned to the Gentile.