1 Corinthians 7:18,19 - Joseph Benson’s Commentary on the Old and New Testaments

Is any man called Brought to the saving knowledge of Christ, and to a participation of his grace; being circumcised Having been born of Jewish parents, and therefore circumcised in his childhood, or being a proselyte of righteousness, and therefore circumcised; let him not become uncircumcised Not act as if he were desirous, as far as possible, to undo what was done for him by his Jewish parents, or others. Is any called in uncircumcision Having been a Gentile by birth; let him not be circumcised The Judaizing teachers urged the Gentile converts to receive circumcision as necessary to salvation. This the apostle declared to be a renouncing of the gospel, Galatians 5:2-3. Circumcision is nothing, and uncircumcision is nothing Will neither promote nor obstruct our salvation. The one point is, keeping the commandments of God Namely, from a principle of faith and love, and with a single eye to the glory of God: for this, according to the same apostle, implies faith working by love, and a new creature, or a new creation, the necessity of which the apostle declares, in similar terms, Galatians 5:6; Galatians 6:15.