Woe unto you, scribes and Pharisees, hypocrites! for you travel on sea and land to make one proselyte, and when he is made, you make him twofold more the child of hell than yourselves.
All Commentaries on Matthew 23:15 Go To Matthew 23
Augustine of Hippo
AD 430
Cont. Faust., xvi, 29 (et cf cont. Adimant. 16): This He said not because proselytes were circumcised, but because they imitated the lives of those from following whom He bad prohibited His disciples, saying, “Do ye not after their works.” Two things are observable in this command; first, the honour shown to Moses’ teaching, that even wicked men when sitting in his seat are compelled to teach good things; and that the proselyte is madea child of hell, not by bearing the words of the Law, but by following their doings. And twofold more than they for this reason, that he neglects to fulfil what he had undertaken of his own choice, having been not born a Jew, but offree will become a Jew.