(13) Is any man called being circumcised? let him not (o) become uncircumcised. Is any called in uncircumcision? let him not be circumcised.
(13) Nonetheless he shows us that in these examples all are not of the same type: because circumcision is not simply of itself to be desired, but such as are bound may desire to be free. Therefore herein only they are equal that the kingdom of God consists not in them, and therefore these are no hindrance to obey God.
(o) He is said to become uncircumcised, who by the help of a surgeon, recovers an upper skin. And this is done by drawing the skin with an instrument, to make it to cover the head. Celsus in book 7, chapter 25.