Gal 2:5

2:5 truth of the gospel. See v. 14; 1:8, 9 and notes. Entrance into the community of God’s covenant people (the church) comes only by faith that is graciously given to the believer by God (1:6, 15; Eph. 2:8). Any attempt to add entrance requirements, such as circumcision, is a denial of the sufficiency of faith in Christ’s merits for satisfying God’s justice, and therefore is a perversion of the gospel.