Charles Ellicott Commentary 1 Corinthians 7:18

"Was any man called being circumcised? Let him not become uncircumcised. Hath any been called in uncircumcision? Let him not be circumcised." — 1 Corinthians 7:18 (ASV)

Is any man called being circumcised?—Better, Was any one called having been circumcised? The previous general rule is now illustrated by, and applied to, two conditions of life—CIRCUMCISION (1 Corinthians 7:18–20) and SLAVERY (1 Corinthians 7:20–24). If any man was converted after having been circumcised, he was not, as some over-zealous Christians might have been anxious to do, to remove every trace of his external connection with Judaism (Galatians 5:2).