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
Theophylact of Ochrid
AD 1107
. Not only, He says, do you corrupt the Jews, but also those who come to the Jewish religion from idolatry. These were called "proselytes." You are eager to convert someone to the Jewish way of life and to circumcision; but when they Judaize, they perish, corrupted by your wickedness. A "son of gehenna" means he who deserves gehenna and stands so close to it by disposition that he is kindled by its flames.